Keep the forum open. Put a permanent ban on the miscreants who's basic intention in visiting the threads is to inflame the others who are actively interested in what is occurring within the AMA. Don't issue warnings, just remove their ability to make posts on RCU. Track them by their real identities, and make the ban a permanent thing. Most of them don't make posts anywhere else anyway. Don't give them the opportunity to poison the entire RC Universe. That would be my vote.

Bill, AMA 4720