Caerie started a thread in the Hive about the appropriate response to trolling, and since I still have thoughts on the matter, I thought I would start this thread here.
For what it's worth, I don't think that there should be two extremes of "ignore the troll" or "ban the troll." I think that threadshitting should be dealt with swiftly and unambiguously. A mod should be able to have the power to kick a threadshitter out of a thread and stop said troll from participating in that particular discussion, with the threat of a stint in Room 101 as backup. Allowing the troll to continue to engage in the conversation does absolutely no good for anybody, and in the cases of a few threads, could actually do harm. I also don't think mods should have to wait for a report to act. Perhaps if the threadshitting has gone on for some time, the threads can be separated, with the trollish posts being sent over to Room 101.