I'm now sick of being a leecher, but I've never actually had any good ideas, but I recently had a fairly good idea, when I saw the scam to steal gold bought from sellers on the Auction House. I was thinking, if you can find a seller who uses the AH to buy, you could make an alt with the same name, then if the gold seller buys your alts auction, rather than yours, you can go and complain that the gold was not sent to you, saying it was sent to the scammer (Your alt). Which then means I would assume, they would do the same process, or just send it through mail, meaning you have 2X the gold you bought!
Sorry if this is absolute shite, but I think its a fairly good idea, and I haven't seen it around, and I've been leeching for 1.5 years