http://www.sythe.org/showthread.php?t=1465032 <--- to scammers vouch as you can see 3people have step forward stating that the scammer had disputed his money via paypal. Proof is all there.
There are a lot of accusations that he scammed, so I'm banning him as a precaution. If he's innocent, he'll need to prove he didn't dispute if he wants to come back.