I just saw the hats G/B issue, and this got me thinking, the administration could be requiring a verified address, or some other information about the person to run the G/B to prevent fraud on the site.
I'm currently running a G/B and I collected ~us$3,000.00 I know noone wiill be rich with this money, but some people are willing to lose their respect and dignity for this amount. I understand that a tighter security might also make things harder for some nice folks that can get good deals on certain part, but I think is a price I'm willing to pay if as a result we don't have more scams affecting us.