Anyone under the illusion that a message board can exist in neutrality is fooling themselves. The sports board I Admin has something called "The Spin Room". We argue all the damn time. However, no one leaves because the greater picture there is sports. On NU the greater picture is politics. Once you get tired of arguing about it, you are limited in what can do at the site. I'm sure they have a hobby section, etc., but it's not the intent of the board. So, you spend half your time busting your ass trying to keep it even, or maybe even tilted towards you ideology, and the other half defending posts you made, or posts made by someone else of which you agree.
When it comes to a board like this, I prefer to be with my kind. Hell, we already argue enough as it is and we're all conservatives.....plus one lib and one Commie.