I'll co-sign most of the "for" arguments (especially Scoob's....lol). And I voted in the 'keep them' column.
I Mod the comic vs. forum, which is one of the busiest forums on KMC outside the OTF and GDF. Thus, I see as much of the crap that goes on as anyone on KMC....but it's hardly enough to create a vague cry for closing them. Far from it, in fact. And given the business of my forum, I'm proud of how little it gets reported (as opposed to, say, this forum which is a mainstay of the reports every day).
There was talk a while back of closing down the SW vs. forum. The gripe was that all of the battles had happened and there wasn't much else to do and incidents of spam and such had risen. The forum stayed, but it was the first serious discussion of closing one. In situations like this, the argument for closing it goes beyond simply "they're a waste" so it's a bit more valid.
But for the majority of the vs. forums, I would defy you to find the amount of nonsense, bashing, and spam that would be needed to intelligently justify talking about closing them down permanently.
And given the sheer popularity of many of the vs. forums, you can't really talk about it from a standpoint of non-use either.
There will be pointlessness in every forum at some point. But just because you either don't understand vs. forums or don't like them (and you're not alone in that respect...many see them as a waste of time) isn't enough to understandably discuss their closing. Enough respectful, intelligent, and worthwhile members take part in vs. discussions to warrant the forums. Until that changes, I see little reason to belabor this discussion.