There are times when a hothead gets a grip on a thread, and any time you show your face they go into hyperdrive with the insults and nasty behavior. If it's a thread where you still have something to say and don't feel like being run off by the cretin who is making up rhymes or cutting and pasting old remarks out of context or posting flimsy "evidence" to supstantiate their position, posting anonymous remarks in the conversation at least makes them stop to think if they're aiming at the right target. Most of the rest of the group still knows it's you, but it slows the perps down a little.