* All users can now view deleted posts.

* Posts now have an is_banned flag for artist removal requests.  Basic users can not view banned posts but gold and higher can.
* Banning an artist both deletes the post and bans it.
* By default deleted posts are not filtered out of post searches at the sql level.

db/migrate/20130322162059_add_is_banned_to_posts.rb

@@ -0,0 +1,14 @@
+class AddIsBannedToPosts < ActiveRecord::Migration
+  def up
+    execute("set statement_timeout = 0")
+    add_column :posts, :is_banned, :boolean, :null => false, :default => false
+    Artist.banned.each do |artist|
+      Post.raw_tag_match(artist.name).each do |post|
+        post.update_column(:is_banned, true)
+      end
+    end
+    PostFlag.where("reason ilike '%requested%' and reason <> 'Artist requested removal'").each do |flag|
+      flag.post.update_column(:is_banned, true)
+    end
+  end
+end