I think the moral is the troll becomes the trolled. I don't like trolls but trolling trolls back doesn't usually work, but in this case it does because you hold all the cards since its your site!
I have found that reasoning with a troll does not work,.... but if you ignore them,,, (like raydog says),... it's like they are'nt really there. =) Some are obnoxiously ignorant,... and troll on old memes where other users can't see them.
