I'm an active member on a forum that uses the xenForo system, and unfortunately there are a lot of hostile, provocative users there. They post troll threads and users rush to reply, berating the OP and further contributing to the nonsense. The problem here is that people are compelled to reply (it's hard to not take the bait), and the thread remains at the top of the front page, giving it more visibility and attracting more attention...you can see the vicious cycle here...
I've always wanted a feature that let you reply to a thread without bumping it. Perhaps there can be configurations around it. Maybe the admins can only allow users to do it once per thread, or only enable it for users who have been registered for X amount of years.
I think this would be a huge gamechanger in combatting forum trolls that plague all of our favorite message boards.