Adding discussion thread functionality. On a given reply to a post, include functionality that allows the users to click a drop-down that would act as a discussion thread. Very similar to Facebook; a reply to a reply.
This would allow users to hide rabbit hole conversations without disrupting the thread with itemized replies. This recommended functionality would give the admins additional leverage in banning trolls as well. It would allows users to decide which should be a new item as a reply, and what should be nested underneath replies, not disrupting the thread.