I'm pretty sure they posted that in another thread where a bunch of sniping was happening, and that post got moved (along with others) to Snippiness. A moderator who hadn't been involved happened upon it and thought they'd posted it there directly.
Can verify. I read that thread pre-move. It was getting harsh and so the person posted alluding to the environment feeling like they were in the Snippiness thread. Later, it was moved to Snippiness along with the others, and hilarity ensued.