Revenge feels great and all but I suggest you should play in another server/IP/whatever it called and just leave them alone in their own shithole.
jezisek: They might think that you are Uby's alt or was told by Uby to get the work done. They will find out sooner or later.
Uberis: I know you're pissed and want to hit them back but believe me, it may lead up to another problem if you do.
Still, its your choice, so if you really gonna do something about it, good luck.