I must say that this is starting to sound like the Lexicon. It may surprise some of you, but hings used to be calm in the Lexicon once.
Like Rom said, we really did have a very calm discussion about a swastika in someone's signiture. The person in question put it in their signature because he admired the way the nazis had rebuilt the German economy (not their other traits/political/social beliefs). Someone was offended by it and publicly asked them to remove it. After the person with the signiture had said why he wanted to include it, there were something like a hundred posts about the subject, and all of them were completely civil and at no point was any mod action threatened. At the end, the person agree that despite his intent not being offensive what so ever, others would probably not know that, and so he agreed to remove it.
I say all this, to demonstrate that even great places need to be careful they don't fall into the same trap. In the Lexicon's case, 2 months later, everyone was at each others throats at every opportunity.
Unfortunately, I don't think there is really any way to guard against this totally. I feel that rules will only serve to annoy people, and that the only real defense we have is common sense.
If you want an example of the type of post that will make this region stay the way it is, just look at Khab's post above. It is calm and collected, and gives the impression of such. It isn't really what Khab said that impressed me, but rather the way she said it. No anger was expressed, just an opinion. No one was confronted (not even implied). As far as my experience goes, it has always served me better to resolve disputes in private rather than in public. I think the same applies for IRC atm, but I digress.
In essence, if everyone keeps a cool head and think before they type, I see no reason why Taijitu can't continue to be a great place.