I'm a sucker for puns here's a short list of some of the ones I do remember:
Osama Bin FALin
People's PSNs that should be banned (I've reported the name twice as offensive):
Sometin like that. He couldnt fit the ''e'' so he does what to lebron?
LMAO!!! that's funny
JennaTolls is really funny too, I can't remember any good ones right now.