I remember trade chat (/2) in wow on the Medivh server would often turn into Chuck Norris jokes. There were always about how bad ass Chuck was. How tough and impossibly manly.
One of my favorites.
Chuck Norris jumped into a lake. Chuck Norris didn't get wet. The lake got Chucked.
Trade chat (like /b/) was never great, but one of the first WoW addons I developed was designed to filter out garbage like this, and make idling with your guildies in Ironforge tolerable.
It's funny for a while, in measured amounts, and then it becomes tiresome.
One of my favorites.
Chuck Norris jumped into a lake. Chuck Norris didn't get wet. The lake got Chucked.