stopgap measure for #1210

app/models/user.rb

@@ -204,8 +204,17 @@ class User < ActiveRecord::Base
       Favorite.where("user_id % 100 = #{id % 100} and user_id = #{id}").order("id desc")
     end
 
+    def clean_favorite_count?
+      favorite_count < 0 || rand(100) < [Math.log(favorite_count, 2), 5].min
+    end
+
+    def clean_favorite_count!
+      update_column(:favorite_count, Favorite.for_user(id).count)
+    end
+
     def add_favorite!(post)
       Favorite.add(post, self)
+      clean_favorite_count! if clean_favorite_count?
     end
 
     def remove_favorite!(post)