diff --git a/app/models.py b/app/models.py
index f7bda98..731c576 100644
--- a/app/models.py
+++ b/app/models.py
@@ -54,6 +54,14 @@ class Users(Model):
         q = f'{Posts.FULL_POSTS_QUERY} WHERE posts.user_id = ? ORDER BY posts.created_at DESC LIMIT ? OFFSET ?'
         return db.query(q, self.id, per_page, (page - 1) * per_page)
 
+    def get_started_threads(self, per_page: int, page: int) -> list:
+        q = f"""{Posts.FULL_POSTS_QUERY} WHERE threads.user_id = ? AND posts.created_at = (
+            SELECT MIN(p2.created_at)
+            FROM posts p2
+            WHERE p2.thread_id = posts.thread_id
+        ) ORDER BY threads.created_at DESC LIMIT ? OFFSET ?"""
+        return db.query(q, self.id, per_page, (page - 1) * per_page)
+
     def get_all_subscriptions(self):
         q = """
             SELECT threads.title AS thread_title, threads.slug AS thread_slug
@@ -289,6 +297,7 @@ class Posts(Model):
             users.id AS user_id, post_history.original_markup,
             users.signature_rendered, threads.slug AS thread_slug,
             threads.is_locked AS thread_is_locked, threads.title AS thread_title,
+            topics.id AS topic_id, topics.name AS topic_name,
             COALESCE(user_badges.badges_json, '[]') AS badges_json
         FROM
             posts
@@ -296,6 +305,8 @@ class Posts(Model):
             post_history ON posts.current_revision_id = post_history.id
         JOIN
             users ON posts.user_id = users.id
+        JOIN
+            topics ON threads.topic_id = topics.id
         JOIN
             threads ON posts.thread_id = threads.id
         LEFT JOIN
diff --git a/app/routes/users.py b/app/routes/users.py
index 29a3af4..453b006 100644
--- a/app/routes/users.py
+++ b/app/routes/users.py
@@ -7,7 +7,7 @@ from ..auth import (
     is_logged_in, parse_username, is_password_valid,
     login_required
     )
-from ..models import Users, Posts, Reactions
+from ..models import Users, Posts, Reactions, Threads
 from ..constants import PermissionLevel
 from secrets import compare_digest as compare_timesafe
 import math
@@ -117,6 +117,8 @@ def posts(username):
     if username == 'deleteduser':
         abort(404)
     target_user = Users.find({'username': username})
+    if not target_user:
+        abort(404)
     PER_PAGE = 10
     posts_count = Posts.count({'user_id': target_user.id})
     page_count = max(1, math.ceil(posts_count / PER_PAGE))
@@ -137,7 +139,23 @@ def threads(username):
     username = username.lower()
     if username == 'deleteduser':
         abort(404)
-    return 'stub'
+    target_user = Users.find({'username': username})
+    if not target_user:
+        abort(404)
+    PER_PAGE = 10
+    threads_count = Threads.count({'user_id': target_user.id})
+    page_count = max(1, math.ceil(threads_count / PER_PAGE))
+    page = 1
+    try:
+        page = max(1, min(int(request.args.get('page', default=1)), page_count))
+    except ValueError:
+        abort(404)
+    threads = target_user.get_started_threads(PER_PAGE, page)
+    return render_template(
+        'users/threads.html', threads=threads,
+        page=page, page_count=page_count,
+        target_user=target_user, Reactions=Reactions
+        )
 
 @bp.get('/<username>/comments/')
 def comments(username):
diff --git a/app/templates/common/macros.html b/app/templates/common/macros.html
index 612578e..ba6386b 100644
--- a/app/templates/common/macros.html
+++ b/app/templates/common/macros.html
@@ -113,7 +113,7 @@
 {% macro full_post(
   post, render_sig=true, is_latest=false,
   show_toolbar=true, is_editing=false, thread=none,
-  show_reactions=true, show_thread=false
+  show_reactions=true, show_thread=false, allow_reacting=true
 ) -%}
 {%- if is_logged_in() -%}
 {%- set can_delete = post.user_id == get_active_user().id or is_mod() -%}
@@ -190,10 +190,10 @@
           {% set reactors_str = reactors_str + '\n...and many others' %}
         {% endif %}
         {% set has_reacted = get_active_user() is not none and get_active_user().username in reactors %}
-        <button disabled title="{{reactors_str}}" class="minimal {{'alt' if has_reacted else ''}}"><img src="/static/emoji/{{reaction.reaction_text}}.png">{{reaction.c}}</button>
+        <button type="button" disabled title="{{reactors_str}}" class="minimal {{'alt' if has_reacted else ''}}"><img src="/static/emoji/{{reaction.reaction_text}}.png">{{reaction.c}}</button>
         {%- endfor -%}
       </span>
-      {%- if is_logged_in() -%}<button disabled title="This feature requires JavaScript to be enabled.">Add reaction</button>{%- endif -%}
+      {%- if is_logged_in() and allow_reacting -%}<button disabled title="This feature requires JavaScript to be enabled.">Add reaction</button>{%- endif -%}
     {%- elif is_editing -%}
       <input type="submit" value="Save">
       <a href="{{get_post_url(post.id, _anchor=true)}}" class="linkbutton warn">Cancel</a>
diff --git a/app/templates/threads/thread.html b/app/templates/threads/thread.html
index 0086528..63c9b44 100644
--- a/app/templates/threads/thread.html
+++ b/app/templates/threads/thread.html
@@ -74,6 +74,14 @@
     {{- pager(page, page_count) -}}
   </fieldset>
 </div>
+<div id="new-post-toast" class="plank even contrast-bg hidden">
+  <span>New post in thread!</span>
+  <span class="notification-buttons">
+    <button>Dismiss</button>
+    <button>View post</button>
+    <button>Stop updates</button>
+  </span>
+</div>
 {%- if is_logged_in() and get_active_user().can_post_to_thread_or_topic(thread) -%}
 <form action="{{url_for('threads.reply', thread_id=thread.id)}}" method="POST" class="plank post-edit-form">
   <h2 class="info">Reply to "{{thread.title}}"</h2>
diff --git a/app/templates/users/posts.html b/app/templates/users/posts.html
index 9c874c1..5fa0733 100644
--- a/app/templates/users/posts.html
+++ b/app/templates/users/posts.html
@@ -4,19 +4,19 @@
 {%- block title -%}{{ target_user.get_readable_name() }}'s posts{%- endblock -%}
 {%- block content -%}
 {%- set td -%}
-  <a href="{{url_for('users.user_page', username=target_user.username)}}">Back to profile</a>
+  <a href="{{url_for('users.user_page', username=target_user.username)}}">&larr; Back to profile</a>
+{%- endset -%}
+{%- call() subheader("%s's posts" % target_user.get_readable_name(), td) -%}
   {%- if posts -%}
   <fieldset class="plank even no-shadow minimal thread-actions">
     <legend>Page</legend>
     {{- pager(page, page_count) -}}
   </fieldset>
   {%- endif -%}
-{%- endset -%}
-{%- call() subheader("%s's posts" % target_user.get_readable_name(), td) -%}
 {%- endcall -%}
 {%- if posts -%}
 {%- for post in posts -%}
-  <div class="post plank">{{full_post(post, show_toolbar=false, show_thread=true)}}</div>
+  <div class="post plank">{{full_post(post, show_toolbar=false, show_thread=true, allow_reacting=false)}}</div>
 {%- endfor -%}
 <div class="plank">
   <fieldset class="plank even no-shadow minimal thread-actions">
diff --git a/app/templates/users/threads.html b/app/templates/users/threads.html
new file mode 100644
index 0000000..e0ea0ec
--- /dev/null
+++ b/app/templates/users/threads.html
@@ -0,0 +1,33 @@
+{%- from 'common/macros.html' import full_post with context -%}
+{%- from 'common/macros.html' import subheader, pager -%}
+{%- extends 'base.html' -%}
+{%- block title -%}threads by {{ target_user.get_readable_name() }}{%- endblock -%}
+{%- block content -%}
+{%- set td -%}
+  <a href="{{url_for('users.user_page', username=target_user.username)}}">&larr; Back to profile</a>
+{%- endset -%}
+{%- call() subheader("%s's started threads" % target_user.get_readable_name(), td) -%}
+  {%- if threads -%}
+  <fieldset class="plank even no-shadow minimal thread-actions">
+    <legend>Page</legend>
+    {{- pager(page, page_count) -}}
+  </fieldset>
+  {%- endif -%}
+{%- endcall -%}
+{%- if threads -%}
+  {%- for post in threads -%}
+  <div class="plank">
+    <h2 class="info"><a href="{{url_for('threads.thread_by_id', thread_id=post.thread_id)}}">"{{post.thread_title}}"</a> in topic <a href="{{url_for('topics.topic_by_id', topic_id=post.topic_id)}}">{{post.topic_name}}</a></h2>
+    <div class="post">{{full_post(post, show_toolbar=false, allow_reacting=false)}}</div>
+  </div>
+  {%- endfor -%}
+  <div class="plank">
+    <fieldset class="plank even no-shadow minimal thread-actions">
+      <legend>Page</legend>
+      {{- pager(page, page_count) -}}
+    </fieldset>
+  </div>
+{%- else -%}
+<div class="plank">{{target_user.get_readable_name()}} has not started any threads.</div>
+{%- endif -%}
+{%- endblock -%}
diff --git a/data/static/css/style.css b/data/static/css/style.css
index 47d3254..e44a408 100644
--- a/data/static/css/style.css
+++ b/data/static/css/style.css
@@ -301,7 +301,7 @@ a.site-title {
 }
 
 .info {
-  margin: 0;
+  margin: var(--base-padding) 0;
   font-size: 1.5em;
   font-weight: bold;
 }