Thraz, don't sweat it. In all of the mmos I've played, I have only encountered perhaps 2 or 3 actual zerg guilds. The term itself has become sort of a meter to measure a players mental capacity. Whenever I hear or see it used to insult another group, I immediatley equate it to being no different than using words like noob. It has no real meaning anymore, and only serves to enlighten you to the users lack of originality and vocabulary.