Add default blacklist

app/logical/anonymous_user.rb

@@ -117,7 +117,7 @@ class AnonymousUser
   end
 
   def blacklisted_tags
-    ""
+    ["spoilers", "guro", "scat", "furry -rating:s"].join("\n")
   end
 
   def time_zone
@@ -128,10 +128,6 @@ class AnonymousUser
     "large"
   end
 
-  def blacklisted_tags
-    []
-  end
-
   def email
     ""
   end

db/migrate/20150728170433_add_default_blacklist_to_users.rb

@@ -0,0 +1,12 @@
+class AddDefaultBlacklistToUsers < ActiveRecord::Migration
+  def self.up
+    execute "set statement_timeout = 0"
+    blacklist = ["spoilers", "guro", "scat", "furry -rating:s"].join("\n")
+    change_column_default(:users, :blacklisted_tags, blacklist)
+  end
+
+  def self.down
+    execute "set statement_timeout = 0"
+    change_column_default(:users, :blacklisted_tags, nil)
+  end
+end