If this thread is about 'haters' or 'trolls', well, is not much you can do about that than identify and monitor them, then if they become a real problem ban them, though that becomes a nightmare in itself, as they start using proxies and new aliases, if they are serious offenders with the tool set and IT knowledge these people tend to have, you just wont be able to keep them out unless you restrict membership to people you know in person only.
Anyhow that is realm of forum admins and cakewalk, as it can be PR headache if done wrong.
Sometimes the people you think are trolling or haters are not, and its better to catch them in house, rather than them spread their sorry tales.
Here is a link to a story I read last week, about the sort of thing that can go wrong on forums when negative people are not listened too.
http://www.huffingtonpost...ic-no-s_b_9873638.html