Shiny had the horrifying abomination that is the Burger King mascot as an avatar for a while, and now she has an equally scary Pope thing going on. Anybody brave enough to use those pictures is the baddest motha in the village baby. Milf also had the Burger King for a while I think, so he's another big contender in my book.
Oh, and Traffic is Irish so that makes him auto-bad dude.