diff --git a/remark.rest b/remark.rest
index 72fd9132..bc69368a 100644
--- a/remark.rest
+++ b/remark.rest
@@ -30,7 +30,7 @@ Content-Type: application/json
 }
 
 ### pin comment
-PUT {{host}}/api/v1/admin/pin/3665976683?site=remark&url=https://radio-t.com/p/2017/12/16/podcast-576/&pin=0
+PUT {{host}}/api/v1/admin/pin/3665976683?site=remark&url=https://radio-t.com/p/2017/12/16/podcast-576/&pin=1
 
 ### vote for comment
 PUT {{host}}/api/v1/vote/3665976683?site=remark&url=https://radio-t.com/p/2017/12/16/podcast-576/&vote=1
@@ -55,3 +55,9 @@ GET {{host}}/api/v1/list?site=remark
 
 ### get config
 GET {{host}}/api/v1/config
+
+### block user
+PUT {{host}}/api/v1/admin/user/username?site=remark&block=1
+
+### delete comment by id
+DELETE {{host}}/api/v1/admin/comment/3665976683?site=remark&url=https://radio-t.com/p/2017/12/16/podcast-576/
diff --git a/web/app/common/api.js b/web/app/common/api.js
index 97b1b9a8..1b84d372 100644
--- a/web/app/common/api.js
+++ b/web/app/common/api.js
@@ -2,11 +2,13 @@ import { siteId, url } from './settings';
 
 import fetcher from './fetcher'
 
+/* common */
+
 export const find = ({ url }) => fetcher.get(`/find?url=${url}&sort=-score&format=tree`);
 
 export const getComment = ({ id }) => fetcher.get(`/id/${id}?url=${url}`);
 
-export const getUser = () => fetcher.get('/user');
+export const vote = ({ id, url, value }) => fetcher.put(`/vote/${id}?url=${url}&vote=${value}`);
 
 export const send = ({ text, pid }) => fetcher.post('/comment', {
   text,
@@ -17,12 +19,28 @@ export const send = ({ text, pid }) => fetcher.post('/comment', {
   ...(pid ? { pid } : {}),
 });
 
-export const vote = ({ id, url, value }) => fetcher.put(`/vote/${id}?url=${url}&vote=${value}`);
+export const getUser = () => fetcher.get('/user');
+
+/* admin */
+export const pin = ({ id, url }) => fetcher.put(`/admin/pin/${id}?url=${url}&pin=1`);
+
+export const unpin = ({ id, url }) => fetcher.put(`/admin/pin/${id}?url=${url}&pin=0`);
+
+export const remove = ({ id }) => fetcher.delete(`/admin/comment/${id}?url=${url}`);
+
+export const blockUser = ({ id }) => fetcher.put(`/admin/user/${id}?&block=1`);
+
+export const unblockUser = ({ id }) => fetcher.put(`/admin/user/${id}?&block=0`);
 
 export default {
   find,
   getComment,
-  send,
   vote,
+  send,
   getUser,
+  pin,
+  unpin,
+  remove,
+  blockUser,
+  unblockUser,
 };
diff --git a/web/app/components/comment/__action/comment__action.scss b/web/app/components/comment/__action/comment__action.scss
new file mode 100644
index 00000000..d9703a9c
--- /dev/null
+++ b/web/app/components/comment/__action/comment__action.scss
@@ -0,0 +1,4 @@
+.comment__action {
+  margin-left: 8px;
+  cursor: pointer;
+}
diff --git a/web/app/components/comment/__controls/_view/_admin/comment__controls_view_admin.scss b/web/app/components/comment/__controls/_view/_admin/comment__controls_view_admin.scss
new file mode 100644
index 00000000..75ada7bb
--- /dev/null
+++ b/web/app/components/comment/__controls/_view/_admin/comment__controls_view_admin.scss
@@ -0,0 +1,3 @@
+.comment__controls_view_admin {
+  color: #ff4700;
+}
diff --git a/web/app/components/comment/__controls/comment__controls.scss b/web/app/components/comment/__controls/comment__controls.scss
index ebd3eb42..0b0f164c 100644
--- a/web/app/components/comment/__controls/comment__controls.scss
+++ b/web/app/components/comment/__controls/comment__controls.scss
@@ -1,7 +1,7 @@
 .comment__controls {
   display: inline-block;
-  margin-left: 8px;
   color: #06c5c5;
+  user-select: none;
 
   @media (hover: hover) {
     margin-left: 0;
diff --git a/web/app/components/comment/__reply/comment__reply.scss b/web/app/components/comment/__reply/comment__reply.scss
deleted file mode 100644
index 31696d41..00000000
--- a/web/app/components/comment/__reply/comment__reply.scss
+++ /dev/null
@@ -1,3 +0,0 @@
-.comment__reply {
-  cursor: pointer;
-}
diff --git a/web/app/components/comment/_pinned/comment_pinned.scss b/web/app/components/comment/_pinned/comment_pinned.scss
new file mode 100644
index 00000000..f21be6bc
--- /dev/null
+++ b/web/app/components/comment/_pinned/comment_pinned.scss
@@ -0,0 +1,7 @@
+.comment_pinned {
+  &, &.comment_view_admin {
+    .comment__username {
+      color: #FFD700;
+    }
+  }
+}
diff --git a/web/app/components/comment/comment.jsx b/web/app/components/comment/comment.jsx
index b1159b7d..5509a54c 100644
--- a/web/app/components/comment/comment.jsx
+++ b/web/app/components/comment/comment.jsx
@@ -14,24 +14,31 @@ export default class Comment extends Component {
       isInputVisible: false,
     };
 
-    this.updateScoreState(props);
+    this.updateState(props);
 
     this.decreaseScore = this.decreaseScore.bind(this);
     this.increaseScore = this.increaseScore.bind(this);
     this.onReplyClick = this.onReplyClick.bind(this);
     this.onReply = this.onReply.bind(this);
+    this.onPinClick = this.onPinClick.bind(this);
+    this.onUnpinClick = this.onUnpinClick.bind(this);
+    this.onBlockClick = this.onBlockClick.bind(this);
+    this.onUnblockClick = this.onUnblockClick.bind(this);
+    this.onDeleteClick = this.onDeleteClick.bind(this);
   }
 
   componentWillReceiveProps(nextProps) {
-    this.updateScoreState(nextProps);
+    this.updateState(nextProps);
   }
 
-  updateScoreState(props) {
-    const { score = 0, votes = [] } = props.data;
+  updateState(props) {
+    const { pin, score = 0, votes = [] } = props.data;
     const userId = store.get('user').id;
 
     this.setState({
       score: score,
+      pinned: !!pin,
+      userBlocked: !!store.get('user').block,
       scoreIncreased: userId in votes && votes[userId],
       scoreDecreased: userId in votes && !votes[userId],
     });
@@ -43,6 +50,52 @@ export default class Comment extends Component {
     this.setState({ isInputVisible: !isInputVisible });
   }
 
+  onPinClick() {
+    const { id } = this.props.data;
+
+    this.setState({ pinned: true });
+
+    api.pin({ id, url }).then(() => {
+      api.getComment({ id }).then(comment => store.replaceComment(comment));
+    });
+  }
+
+  onUnpinClick() {
+    const { id } = this.props.data;
+
+    this.setState({ pinned: false });
+
+    api.pin({ id, url }).then(() => {
+      api.getComment({ id }).then(comment => store.replaceComment(comment));
+    });
+  }
+
+  onBlockClick() {
+    const { user: { id } } = this.props.data;
+
+    this.setState({ userBlocked: true });
+
+    api.blockUser({ id });
+  }
+
+  onUnblockClick() {
+    const { user: { id } } = this.props.data;
+
+    this.setState({ userBlocked: false });
+
+    api.unblockUser({ id });
+  }
+
+  onDeleteClick() {
+    const { id } = this.props.data;
+
+    api.remove({ id }).then(() => {
+      if (this.props.onDelete) {
+        this.props.onDelete();
+      }
+    });
+  }
+
   increaseScore() {
     const { score, scoreIncreased, scoreDecreased } = this.state;
     const { id } = this.props.data;
@@ -82,8 +135,9 @@ export default class Comment extends Component {
     this.setState({ isInputVisible: false });
   }
 
-  render(props, { score, scoreIncreased, scoreDecreased, isInputVisible }) {
+  render(props, { userBlocked, pinned, score, scoreIncreased, scoreDecreased, isInputVisible }) {
     const { data, mix, mods = {} } = props;
+    const isAdmin = store.get('user').admin;
 
     const time = new Date(data.time);
     // TODO: which format for datetime should we choose?
@@ -100,9 +154,14 @@ export default class Comment extends Component {
       },
     };
 
-    return (
+    const defaultMods = {
+      pinned,
       // TODO: add default view mod or don't?
-      <div className={b('comment', props, { view: data.user.admin ? 'admin' : null })}>
+      view: o.user.admin ? 'admin' : null,
+    };
+
+    return (
+      <div className={b('comment', props, defaultMods)}>
         <div className="comment__body">
           <img src={o.user.picture} alt="" className="comment__avatar"/>
 
@@ -111,23 +170,57 @@ export default class Comment extends Component {
               <span className="comment__username">{o.user.name}</span>
 
               <span className="comment__score">
-              <span
-                className={b('comment__vote', {}, { type: 'up', selected: scoreIncreased })}
-                onClick={this.increaseScore}
-              >vote up</span>
+                <span
+                  className={b('comment__vote', {}, { type: 'up', selected: scoreIncreased })}
+                  onClick={this.increaseScore}
+                >vote up</span>
                 <span className="comment__score-sign">{o.score.sign}</span>
                 <span className="comment__score-value">{o.score.value}</span>
-              <span
-                className={b('comment__vote', {}, { type: 'down', selected: scoreDecreased })}
-                onClick={this.decreaseScore}
-              >vote down</span>
-            </span>
+                <span
+                  className={b('comment__vote', {}, { type: 'down', selected: scoreDecreased })}
+                  onClick={this.decreaseScore}
+                >vote down</span>
+              </span>
 
               <span className="comment__time">{o.time}</span>
 
               <span className="comment__controls">
-              <span className="comment__reply" onClick={this.onReplyClick}>reply</span>
-            </span>
+                <span className="comment__action" onClick={this.onReplyClick}>reply</span>
+              </span>
+
+              {
+                isAdmin &&
+                (
+                  <span className={b('comment__controls', {}, { view: 'admin' })}>
+
+                    {
+                      !pinned && (
+                        <span className="comment__action" onClick={this.onPinClick}>pin</span>
+                      )
+                    }
+
+                    {
+                      pinned && (
+                        <span className="comment__action" onClick={this.onUnpinClick}>unpin</span>
+                      )
+                    }
+
+                    {
+                      userBlocked && (
+                        <span className="comment__action" onClick={this.onUnblockClick}>unblock</span>
+                      )
+                    }
+
+                    {
+                      !userBlocked && (
+                        <span className="comment__action" onClick={this.onBlockClick}>block</span>
+                      )
+                    }
+
+                    <span className="comment__action" onClick={this.onDeleteClick}>delete</span>
+                  </span>
+                )
+              }
             </div>
 
             <div className="comment__text" dangerouslySetInnerHTML={{ __html: o.text }}/>
diff --git a/web/app/components/comment/index.js b/web/app/components/comment/index.js
index a3edfb37..81cfc497 100644
--- a/web/app/components/comment/index.js
+++ b/web/app/components/comment/index.js
@@ -2,12 +2,15 @@ export { default } from './comment';
 
 require('./comment.scss');
 
+require('./__action/comment__action.scss');
 require('./__avatar/comment__avatar.scss');
 require('./__body/comment__body.scss');
+
 require('./__controls/comment__controls.scss');
+require('./__controls/_view/_admin/comment__controls_view_admin.scss');
+
 require('./__info/comment__info.scss');
 require('./__input/comment__input.scss');
-require('./__reply/comment__reply.scss');
 require('./__score/comment__score.scss');
 require('./__score-sign/comment__score-sign.scss');
 require('./__score-value/comment__score-value.scss');
@@ -22,4 +25,6 @@ require('./__vote/_type/_up/comment__vote_type_up.scss');
 
 require('./_level/comment_level.scss');
 
+require('./_pinned/comment_pinned.scss');
+
 require('./_view/_admin/comment_view_admin.scss');
diff --git a/web/app/components/thread/_hidden/thread_hidden.scss b/web/app/components/thread/_hidden/thread_hidden.scss
new file mode 100644
index 00000000..ce7eb403
--- /dev/null
+++ b/web/app/components/thread/_hidden/thread_hidden.scss
@@ -0,0 +1,3 @@
+.thread_hidden {
+  display: none;
+}
diff --git a/web/app/components/thread/index.js b/web/app/components/thread/index.js
index c774686b..b995c833 100644
--- a/web/app/components/thread/index.js
+++ b/web/app/components/thread/index.js
@@ -1,3 +1,5 @@
 export { default } from './thread';
 
 require('./thread.scss');
+
+require('./_hidden/thread_hidden.scss');
diff --git a/web/app/components/thread/thread.jsx b/web/app/components/thread/thread.jsx
index f7b0d5e6..2910ab19 100644
--- a/web/app/components/thread/thread.jsx
+++ b/web/app/components/thread/thread.jsx
@@ -3,12 +3,31 @@ import { h, Component } from 'preact';
 import Comment from 'components/comment';
 
 export default class Thread extends Component {
-  render(props, state) {
+  constructor(props) {
+    super(props);
+
+    this.state = {
+      hidden: false,
+    };
+
+    this.hide = this.hide.bind(this);
+  }
+
+  hide() {
+    this.setState({ hidden: true });
+  }
+
+  render(props, { hidden }) {
     const { data: { comment, replies = [] }, mix, mods = {} } = props;
 
     return (
-      <div className={b('thread', props)}>
-        <Comment data={comment} mods={{ level: mods.level }} onReply={props.onReply}/>
+      <div className={b('thread', props, { hidden })}>
+        <Comment
+          data={comment}
+          mods={{ level: mods.level }}
+          onReply={props.onReply}
+          onDelete={this.hide}
+        />
 
         {
           !!replies.length && replies.map(thread => (