I really like what Robomatic said: The fine. Establish the fine by (prearranged) vote when he's there. Of course, given your description of him, he'll run afoul of it. Call him on it. He'll either pay up grudgingly, with protest, or walk out.

If he pays up, given who he seems to be, he'll run afoul of it again. (And again and again?)

Eventually he'll either shape up (you should live so long) or stop coming around.

Dave Oesterreich