diff --git a/boards/admin.py b/boards/admin.py
--- a/boards/admin.py
+++ b/boards/admin.py
@@ -2,18 +2,24 @@ from django.contrib import admin
 from boards.models import Post, Tag, Ban, Thread
 
 
+@admin.register(Post)
 class PostAdmin(admin.ModelAdmin):
 
     list_display = ('id', 'title', 'text')
     list_filter = ('pub_time', 'thread_new')
     search_fields = ('id', 'title', 'text')
+    exclude = ('referenced_posts', 'refmap')
+    readonly_fields = ('poster_ip', 'thread_new')
 
 
+@admin.register(Tag)
 class TagAdmin(admin.ModelAdmin):
 
     list_display = ('name',)
+    search_fields = ('name',)
 
 
+@admin.register(Thread)
 class ThreadAdmin(admin.ModelAdmin):
 
     def title(self, obj):
@@ -22,17 +28,16 @@ class ThreadAdmin(admin.ModelAdmin):
     def reply_count(self, obj):
         return obj.get_reply_count()
 
-    list_display = ('id', 'title', 'reply_count', 'archived')
-    list_filter = ('bump_time', 'archived')
+    def ip(self, obj):
+        return obj.get_opening_post().poster_ip
+
+    list_display = ('id', 'title', 'reply_count', 'archived', 'ip')
+    list_filter = ('bump_time', 'archived', 'bumpable')
     search_fields = ('id', 'title')
 
 
+@admin.register(Ban)
 class BanAdmin(admin.ModelAdmin):
     list_display = ('ip', 'can_read')
     list_filter = ('can_read',)
-    search_fields = ('ip',)
-
-admin.site.register(Post, PostAdmin)
-admin.site.register(Tag, TagAdmin)
-admin.site.register(Ban, BanAdmin)
-admin.site.register(Thread, ThreadAdmin)
+    search_fields = ('ip',)
\ No newline at end of file
diff --git a/boards/models/thread.py b/boards/models/thread.py
--- a/boards/models/thread.py
+++ b/boards/models/thread.py
@@ -138,10 +138,6 @@ class Thread(models.Model):
         self.tags.add(tag)
         tag.threads.add(self)
 
-    def remove_tag(self, tag):
-        self.tags.remove(tag)
-        tag.threads.remove(self)
-
     def get_opening_post(self, only_id=False):
         """
         Gets the first post of the thread
@@ -185,3 +181,11 @@ class Thread(models.Model):
 
     def __str__(self):
         return 'T#{}/{}'.format(self.id, self.get_opening_post_id())
+
+    def save(self, force_insert=False, force_update=False, using=None,
+             update_fields=None):
+        super().save(force_insert, force_update, using, update_fields)
+
+        if not update_fields or 'tags' in update_fields:
+            for tag in self.tags.all():
+                tag.threads.add(self)
\ No newline at end of file