I won't be posting in it myself... I have friends on both sides of the political fence and tend to just ignore them when I disagree with them for the sake of staying friends/happy. That said, I can attest that the staff here will be incredibly heavy-handed with any members who carry it outside this proposed forum.
I'm not personally completely in favor of it actually, however I agree that I feel a comparison with Rebelscum isn't really fair. They're far less moderated there and many of their "problems" aren't banned in the first place. Around here we happily give many people the boot for the sake of the community... You could have 10,000 posts here and you'd still get banned for being a dick.
I think we do have the "maturity" here... I like some of the suggestions too on time spent, post count/content, etc., as all criteria to be allowed in, however I do not have the expertise to know whether our software would allow those kinds of things to restrict or allow access and such. That'd be something Chris or Jeff would know.
I think the discussion, so far here, is at the very least a sign of the caliber of membership we have here, so that makes me happy unto itself. I'm sure this isn't something we're just jumping into though, and the discussion is incredibly helpful so feel free to keep it coming guys.