When someone starts arguing about something that everyone else knows was clearly meant as a joke and not serious OR a troll (disguised as serious to incite a reaction), effectively trolling themselves by being stupid and overly literal.
Frick: Sarah Palin? Wasn't she one of the Monty Python cast? (heh heh)
Frack: No, you idiot! She used to be governor of Alaska. You're thinking of Michael Palin. Wow, you're dumb.
Frick: Yeah thanks, I was joking, you dipshit. Nice autotroll.