As painful as these threads are for some people, I think they serve a useful purpose. They provide honest feedback & allow open discussion of how people feel about the forum, good & bad. I really don't see a problem with that, we are all adults. This type of honest airing is good in the long run, it allows people to let off steam and is a decent gauge of where the membership stands on certain issues.
People will decide to leave, because it's just not what they want from a forum. But it clears the air to an extent and offers the mods an idea of where perhaps some people don't agree with them.
The answer may well be, "that's the way it is, there are other forums available". And that's absolutely fine, because it restates what LSP is all about and allows the mods the opportunity to speak about their perspective, which is rarely aired.
I think it's all healthy.