How It's Done

I may have mentioned that I moderate comments on posts older than ten days old, due to aversions to both spam and trolls, and that I look, stylistically, to the moderation mechanics of Making Light.  (Yes, I sometimes disagree with them.  What else is new?)

Anyway:  On a post from 2005, mostly dormant, someone jeers, several people attempt correction, and the moderator steps in after further jeers.  After more exchanges (and gardening advice and tales of Tomatoes) the moderator posts a warning.

Perpetrator has not yet flounced.