Michael,

Block the url in htaccess. Blocking one deviant URL won't effect your other TGP work. While having someone hotlink IS a part of dark side of the business, you shouldn't have to pay the price. Block the fucker.

Question... is this person linking ONLY the pics? Or is he/she bold enough to be posting a thumb/text that links to the larger pics as well? LMK I'm asking this because if he is sending the surfer to your site to see the larger pic but just bypassing your ads and html, then there is a way to work this to your benefit.

Gary-Alan