Moderation is such a hard job! Who's to say when enough has been said on a subject, and when another thread would be beneficial?
I say we ought to have a forum where anyone wanting to say something has to put it in exactly the spot it belongs in, filed under a category and a sub-category and any number of sub-sub-categories. Then, that statement itself becomes a sub-category, and future posts responding to it must be filed under it. That way, it's impossible to post something that's already been said without reading the post that already said it. In fact, that's what I do at my site,
debatemodeling.org. Soon to have a Windows version available.