Look for either the php user agent and/or the source ip. Why not use mod_redirect or something and redirect him to some bizarre internet meme site? I would sugg

Look for either the php user agent and/or the source ip. Why not use mod_redirect or something and redirect him to some bizarre internet meme site? I would suggest tub girl or goatse. It will get the point across very loud and clear. Or, just serve a different copy of your site to him that makes it loud and clear what he is doing is not ok. Either way, you can use mod_rewrite to cause this guy agony and prevent him from perpetrating this.