Quote Originally Posted by Ciaran
Now, this is the single most stupid rule I ever came across. I wage war against one Catholic country and get threatened with xcommunication, but after I got warned, no one care how much countries I attack? Now tell me that makes sense
Of course, it might come pretty handy...

It is pretty silly that you can get away with that, but I strongly doubt CA did it on purpose. If anything, it was most likely just faulty programming. Whoever did the coding for Medieval, the possibility of a Catholic faction attacking another Catholic faction after receiving a Papal warning probably never occurred to them. (And when you really think about, why would it?) As it is, it was still quite some time before most MTW players became aware of this flaw in the first place, much less actually took advantage of it.