So if the user visits this chat room, (to which I linked him in a comment below one of his PSQ answers) visits this discussion, you are effectively advising him to just cover his tail, and try not to be noticed. If you do that and don't happen to post a complaint about a question of yours, at any point in the future, that may be deleted, your off the hook, and you can continue closing PSQ's that others answer, as well as continue to answer poor PSQ's when you want to earn some easy rep, @quid?
I admit, I'm rather surprised that you are essentially waving away such behavior; perhaps the problem is that the user has been fooling most by his secretive closing of only PsQ's that have already been answered by others, and answering those he can answer first. I think it's time to call this behavior out, as clearly, no mod has the guts to send a "warning/email" expressing recognition of his questionable and contradictory standards. But I guess my only option then is to inform the community..