Oh boy. I hate to explain rape this but I see I have no choice. Obviously I know he's a troll, in fact it utterly amazes me how many people couldn't see that right off the bat. It amused me to see so many people take the bait so I gave him a thumbs up to say good job on the trolling and my response was to perpetuate the troll thread and kinda poke fun at the people who kept carrying on even after he admitted he was joking.
If required I can also explain this using crayons and/or finger puppets.