User blog comment:DaNASCAT/Technical Update: October 25, 2011/@comment-3279487-20111025183446/@comment-957747-20111027054016

Leviathan, you don't have to have FB is a block list. If you're running a typical ABP list, it automatically blocks the Facebook iframe (I know, I don't see any of them and have to manually show them). I am unsure why you don't see them in Monobook, I've never checked to see if I can see the Facebook apps in Monobook.