It really depends on the forum. I (rarely) post on a different forum where there is a near daily occurrence of mass moves/locks in the general board because the mods want you to 1. search 2. post in the right forum 3. not post something they disagree with. The members seem to have mebraced it for the most part, so all the posts in these doomed threads are IBTLs or name-calling. You can't post new threads on old topics, but you also can't resurrect old topics, they really stifle discussion, seemingly on purpose.
Start a Cold Steel or Sebenza thread, you'll get genuine replies, and maybe 10%, if that, will be complaints and pleas to search. People will talk about these things, repeatedly. Merging doesn't always work, who's going to read a thousand post thread? Posts in here also come slowly. Ten replies in an hour means a fairy popular thread that hasn't yet become a flamewar, imo. On other boards, there are bets to see how quickly a thread can hit a grand, 2500, or one place at times tries to beat a record run to 500, which took somewhere around two minutes.
I think it's because the subject of knives doesn't change as quickly. If I post a knife related article here that's more than three hours old, I don't expect to be inundated with posts saying 'it's cold in here' like I get in many other forums. Search is borked, so it's forgivable for most, and BF just isn't as mean-spirited and maturity-challenged as many other places.