Balance is not needed. It's a side effect of misbehavior. The biggest group of miscreants should be spammers, not members. The forum is supposed to be a tool. General Nonsense is for (drumroll) nonsense. That's the subforum in which threads can be useless.
If you post a thread with a legitimate question, you want a legitimate answer. Someone replies, maybe answering it, maybe trying to answer it, then a second person comes along and tangents the first reply. More and more people come along and ignore the thread's original purpose, and you have a useless thread and your problem continues.
Then in the future, someone's Googling with a similar issue, comes across the thread, and realizes that it's useless.