We could try to talk about him in a way that discourages him, makes him see that he was not successful.
For example, I thought the first picture was kinda hot.
While the lady involved was quite pretty, the pose, facial expression, and other elements of the shot were kinda turnoffs. Not to mention there was clearly either a ton of makeup or a liberal application of photoshop, which certainly have their place, but combo'd with all the rest of it to seem to emphasize her role as a sex object whose only emotion is appreciation for the guy's genitals. Not really my thing, but that's just me - there's no Right Way to fantasize, after all.
Still, it was clever to start the whole thing off with fairly bland pornography to suggest that there's nothing to fear here other than
Promotions (note: the page itself is SFW, but the site in generally is certainly not). But after that it was all downhill - no subtlety, no cleverness. Just unpleasant images and a random gif describing his hoped-for reaction. It's like the script kiddy of trolling.
6/10, would not be trolled by again.
EDIT: Yeah, we're unlikely to be able to stop him unless we freeze signups for a week or something equally absurd. That would be the PATRIOT Act of troll responses. You'll have to be content knowing he's paying somebody for the privilege of doing this.