We're not not dealing with it. On occasions where someone is obviously just trying to rip off our members, we show them the door. But a lot of the time scamming reports are "he said, she said" affairs that we haven't got a hope of dealing with.
If members remembered to back up the saves before a trade, only traded with established members, weren't greedy and tried to remember that if it looks too good to be true it probably is, we wouldn't have anywhere near the amount of issues we do. If they also kept documentary evidence (logs of messages, logs of transfers), we'd be better able to deal with it. "i sent lolripuoff a vettle x12010 an 4 matt grenes an he deleted me an sed he hadnt got them!!!!! BEWARE SCAMMER!!!!" helps no-one.
Trades are conducted at your own risk and by a one-to-one agreement between you and the person with whom you're trading - and they're not even, technically, a feature of the game! Ultimately we're not involved and can only act to protect our members if we are confident that misappropriation can be proven.