sorry saadow, it isnt an infraction, it has been said multiple times that i can remember over the years that it is not against the rules.... it never has been.
any implementation of anything to allow people to get revenge on scammers would have to be automated, so like a tag put on the item with its owners name/id if it gets traded and no money changes hands. then if that item isnt returned to owner in X time then you get your card. There is no way it could be a support ticket thing, GMs always have enough to do.