I agree entirely with your reasoning. Don't think I am criticizing your intentions. Unfortunately, I think you might be barking up the wrong tree. From what i've seen 99% of all the problems with gender related discussion are caused by someone expressing that gender is male and female and there's no way around that. Unfortunately, these same people also have a... less than diplomatic way of expressing their beliefs. I'm not saying the fault is all theres, not at all, but it seems to me you are trying to deal with the problems post facto rather than cutting the head off beast, so to speak.
Also, don't think i'm taking a side. I'm just saying that sometimes people can easily offend others without realizing it. Usually, the types of posts i'm talking about aren't even technically offensive or roughly put. They generally just leave no room to consider alternatives. The debates that follow are usually what consume the threads, with one side trying to sway that opinion and the other very stoically, and with what appears to be little reconsideration or new argument defend the alternative. I've noticed that it IS generally binary gender arguments that start this. So take that how you will.
In the end I just think these rules are easily circumventable/don't deal with the root problem. Unfortunately, I feel like i've done more to derail this thread by arguing this then actually talking about gender issues, and for I apologize. Indeed, I think I'll leave it at this for now if you don't mind to get past it?