I used to play a Scout in one of the MMORPG's where they'd spam the whole zone with who killed who... so I named him Ignorance. So whenever I killed someone it would spam "So-and-so was killed by ignorance". I guess a while later it became pretty common. People naming their characters "Stupidity" and all kinds of mildly amusing ones.
More recently we played in a Matrix campaign and one of the players named their character "Fuk Yu" (sounds like Fook You). We joked that her real life identity (outside the Matrix) was that of a Chinese Gold Farmer.