I know I'm an outsider but I agree with that, as mods (me elsewhere obviously) we're not here to dictate when and where people can talk about things. The only time we merge on topic threads on our board is when the threads are basically identical. After a game though we'll find there's threads that have started off very similarly going off on different tangents. If we merged them it'd stifle conversation, I think I've actually seperated more match threads than I've merged in order to make them more easily readable when there's two or three themes developed. It was worth it with the cross boards because it also gave you somewhere to direct the banter to, which allowed for serious discussion of things you should change for the next game to be uninterrupted by WUMs. Oh, that's one exception I would make to what I said above, if people did that on ours it would end up being put into one match thread when one of us saw it, it might not be til 8pm on a Saturday, but it would be done. Thankfully our lot don't and there's usually someone starts a "live" match thread for us (different people depending on who's around).
The way to go is EITHER to insist Brix and Nuts become professional mods manning the site at all times, jacking in their daytime jobs and taking a salary from us after we club together (and since both of them are hugely successful executives, it'll cost us all a bob or two to fully compensate them) OR we all take responsibility for posting sensibly and don't open a new thread if there's another one relevant unless the subject-matter can reasonably be distinguished from that other one (and isn't just a case of the poster "bigging up" his own comment with a new thread) I go for option (b)