Both of those were locked because they turned into slanging matches, not because they would have dragged on. A thread can drag on forever without being locked for all we care, as long as you're not all at each other's throats. Locking the thread is a way to let everyone cool down, and its not necessarily permanent.
OK
Look, I know the incest thread was getting tediously repetitive but there wasn't any offensive remarks. I think we should agree to disagree.
Anyway, thank you guys for the awesome work you do on this forum