I don't know. Having extensive policies and warnings and an explicit process for defining whether or not someone is being an unfun dick just seems to me to give people ways to weasel out of admitting they are being an unfun dick. Ohh I didn't realize, no one else I page detailed descriptions of my dick to seems to mind. I've never even heard a complaint! Oh, you've talked to me about this before? Ahh, well, I appealed that talk and so now I'm only at the step 1 warning so I guess I will do what I want until I'm at step 9? Ass covered? I guess?
It seems to me cleaner to have a reasonable staff(er) be the disciplinarian. Kind of a, if you do something dickish but it could be a misunderstanding or maybe you just don't know any better due to changing game cultures, that person will ask you to cease and desist, and then if you do it again they can just tell you that you aren't a good fit and to hit the road. Or, if someone does something really, truly reprehensible to another player, you can just give them the boot right then. No letting them linger through warnings and appeals, likely paging their victims the whole time to pressure them to recant.
I think better is pretty hard to define when it comes to things like "how to police a pretend fun time game where nothing really matters", but I can definitely say which style I'd prefer in the games I personally play.