There's a fine line (very fine) between debates and all-out mud-slinging. And that goes double for the gaming community. I think the moderation team knows this, and tries to stay ahead of the curve when they see the potential for things to get ugly. Because when things start to get ugly, they become unproductive. Some people may enjoy watching the mud fly, as they see it as something akin to a Jerry Springer episode circa 1998, but it keeps a lot of good posters from posting and overall, drags the whole community down. So I'm okay with it most of the time.
But if it's not getting personal, or doesn't look like it's about to get personal, I think a healthy debate is fine. You just have to be careful.