In my time here, I’ve seen very few instances of severe trolling or flaming. I really believe it occurs in certain subdomains more than others (and in some not at all) and generally revolves around someone daring to write something other than the OTP of the reader, or in some way bashing (or failing to bash) a specific character. Think Weasley-bashing in the harry Potter subdomain, or the fixation on Sasuke cuckolding Naruto in that subdomain. Aside from those instances, the flaming and trolling has been minimal here, maybe because we tend to moderate actively and we deal with flamers and trolls quickly.
We do have limitations here that other sites don’t have, such as not allowing authors to reply to review on their review board, but one advantage to our forums is that only the author needs to be a member to create a review reply thread. Non-members can read and reply freely, and we’ve completely fine with including the url to your review reply thread in the story. I sometimes include it as a footnote AN, just a quick lime letting readers know (right above that handy link) that I do like reviews, so please drop me a line. I do allow anonymous reviews, and I’ve never really regretted doing so, even given that I’m sure to piss people off on a regular basis as a moderator who might have warned their story or even hidden it.
But concrit? Good solid concrit is my favorite thing in the world, and I still haven’t forgiven Shadowknight12 for vanishing and not leaving me his wonderful, and very useful concrit. Snarky paladins aren’t what they used to be, that’s for damned sure.