It happens all the time in this business. About the best thing you can do, and what I do, is block his IP's, credit cards, and all that jazz so he can never sign up for anything you own again. Obviously you had somethiing of interest to this joker, so he might try this shit in another year when you have more content.
Just block everything about him so he can't do anything, and when/if he contacts you (which has happened from time to time) THEN you hit him with the drama.
