It is a part of the game whether you like it or not.
You can literally have fun with anything in this game which is why it is the best MMO atm.
For example, 5 of my friends made alliance Rogues on a populated horde server. Dressed up like Pirates, with a Pirate guild name, and they gank people in Argus.
The first time I got ganked by them even tho I didn't know it was them. it was amusing. 5 dwarven rogues with red pirate hats stabbing you to death.