When I played WoW, there were quite a few guild names on my server (Eldre'Thalas) that made me chuckle. The only ones I can think of at the moment are:

Fatkidsarehardtokidnap [They didn't last long before facing the wrath of GMs as far as I know]

Me So Hordee [One of my personal favorites since I have the sense of humor of a child in middle school]

Bad Moo Rising [what was with the Horde guilds and their clever puns?]