I really take issue with the notion that threads are constantly closed or deleted. The Men, Boys, and Girls threads were deleted because two of them were verging on pornographic, and it didn't seem fair to keep the third. The forum doesn't seem to have suffered a great loss either.
Sometimes I have to close a thread in the Pop & Justice section because a conversation is moving so fast that even if I post for people to stop and move on to something else, it's ignored. It's hard to take the twenty minutes required to send a dozen personal messages when someone might be posting, "Stop being such a cunt!" which no one cares to see and only gets people more riled up.
It's nice to say, "Well, if the moderators just cracked the whip a bit more things could be fixed," but there's only about six people who responsibly report issues on the forum, and as much talk as there is of Random Thoughts forming a community, there aren't a whole lot of you who try to make it a very positive place. There's always been snark on the forum, but now a lot of people seem to only post in order to be sarcastic towards one another, and Random Thoughts is often the biggest breeding ground of that behavior.