I can see you point G-Flex, and... I think it would be perfectly valid if the forum was one you were running, or if the forum had a clearly defined aim towards serious discussion.
But... I'm not sure we do here. The upper forums have had plenty of randomness and messing around (cat jokes? child murdering? bizarre mods?) since forever. I really don't think that there is any reason to have an aim to stamp out sillyness.
I mean, turning it around, serious discussion often spills over into the silly threads, with people complaining about them inside. They also attract the kind of people who discuss things seriously. Should we get rid of them in order to avoid having them ruin things for people on the silly threads?
You're right that none of it's my decision, and that I can't decide what sort of atmosphere the forum should have. I can, however, say what I think is reasonable based on certain things I can assume (for instance, that the forums are an important part of the community surrounding bay12games and are important to bay12games' image and, to some degree, its success/donations), and give my own perspective. It's not like I'm going to get pissed off and stamp my feet if Toady considers it and reaches different conclusions than me.
However, regardless of whether you value "silliness" or "seriousness" or whatever people in this thread have decided the discussion is about, there's also a lot of strange, disruptive, cliquey behavior that I'm not sure I'd like one way or the other. Again, that's just me. Actually, no, it's not just me, it's me and probably a dozen other people I could name off the top of my head and undoubtedly plenty of others I can't, but it's still subjective.