That was probably the extortion they were referring to.
Hah, did a little digging, he was trying to use Paypal to buy BTC, no wonder you've been given negative trust.
https://bitcointalk.org/index.php?topic=873652.msg9657209#msg9657209 - Here's the thread, OP, if you don't want negative trust, don't use paypal, I've bought BTC just using wire transfers over localbitcoins, no one is going to use Paypal because you can easily reverse the transaction on them after they've given the Bitcoins, do us a favour and don't play innocent.
He was trying to sell not buy, and that was after this drama. Probably a last ditch attempt to try scam some money via Paypal.