This is one of the reasons why DT should be removed completely. Scammers will and have found their way on to the list. The fact that there have been scammers on DT proves that DT isn't to be trusted, and the perceived trust is largely an illusion. DT list should only be a "people unlikely to scam others" list, and being on the list should signal nothing else.
Anduck, that makes zero sense at all--not surprising since you think bidding on your own auctions is OK. We've just agreed that DT members get removed if they prove to have bad judgement. What you're arguing is basically like saying "there have been some dirty cops (and they've been fired); let's get rid of the entire police force because obviously it isn't working".