There is nothing on this site that forces you to come in contact with that person in a manner that costs you anything. The TP Open has an entry fee. Knowing that those types of competitions with bigger awards are the ones that sandbaggers and cheaters are going to enter, just avoid them. Let them all fight it out among themselves!
If WGT can turn a profit on tournaments entered only by the scums, let them. If they can't, they'll restructure the tournaments and/or change their policing tactics.
Beyond that, when you see a suspect like the one you are pointing out, turn them in. If justice is meted out, fine. If not, that's fine, too, since you haven't lost anything to them.