Hello,
Even if he provided screenshot with server info, GM's are not going to take permanent action at all. For example, there are 3 different topics just this weekend regarding this Cin person and his new created chars with server info included and NO ACTION IS TAKEN.
There were a lot of complaints from other players and numerous posts in forum but he can still terrorize BG. Even with this many proof, GM will just write a generic reply like "yes, we punished him bad" and next week you will see this person again. Thats how they value their own server.