Yeah, but I think there are sites that already do what you're describing Craig. Winston was interested in specifically looking at skeptical arguments. If you did that and also banned skeptics from piping in to defend, it would be a bit farcical. Just a lot of +1ing and really not of use to anyone (well, except for those who just want to rant without facing opposition). Doubt it would last long.
This site has unfortunately been in decline from before I joined.
Too bad. I disagree with winston on pretty well everything, but he's a hoot and can at least spawn interesting topics for discussion. And I'll give him credit for really allowing opposite views free reign.