You raise a good point. There are certain statistically proven differences between sexes and making generalizations based on these statistics is a good strategy for example under the conditions you specified. Differencies of this kind include things like "men on average are taller than women" and "women on average have higher percantage of body fat than men". I don't think anyone in here has a problem with generalizations like these.
My point was that there is a different class of generalizations which is problematic. One of the examples I used above was "men don't cry". This implies that if you don't adhere to the norm described, you don't fit in. Showing emotions is "unmanly" and and boys are actually told this when growing up (using a masculine example purely intentional). While the claim "men don't cry" might have some statistical support, we should think about the causal relations between the claim and the reality. The fact that the claim exists and is used bringing up boys will establish a situation where it becomes a norm. Men will not cry because they are told not to, not because that is inherently built in the Y chromosome. With generalizations like this everyone in here should have a problem.
On your comment about excluding discussions about sex from other discussions about rationalism: I think this would generate a unneccessary blind spot. Rationalism should be applied whenever possible, and I find discussions about sex in no way an exception to this "rule". The area is difficult because humans are so interested in it and it affects us in many ways, most of which are hard to see. This is why there might be a lot to gain.
This is simply a case of confusing normative statements with descriptive ones. If we raise the sanity line enough, such misconceptions should vanish spontaneously.
Disclaimer: If you are prone to dismissing women's complaints of gender-related problems as the women being whiny, emotionally unstable girls who see sexism where there is none, this post is unlikely to interest you.
For your convenience, links to followup posts: Roko says; orthonormal says; Eliezer says; Yvain says; Wei_Dai says
As far as I can tell, I am the most active female poster on Less Wrong. (AnnaSalamon has higher karma than I, but she hasn't commented on anything for two months now.) There are not many of us. This is usually immaterial. Heck, sometimes people don't even notice in spite of my girly username, my self-introduction, and the fact that I'm now apparently the feminism police of Less Wrong.
My life is not about being a girl. In fact, I'm less preoccupied with feminism and women's special interest issues than most of the women I know, and some of the men. It's not my pet topic. I do not focus on feminist philosophy in school. I took an "Early Modern Women Philosophers" course because I needed the history credit, had room for a suitable class in a semester when one was offered, and heard the teacher was nice, and I was pretty bored. I wound up doing my midterm paper on Malebranche in that class because we'd covered him to give context to Mary Astell, and he was more interesting than she was. I didn't vote for Hilary Clinton in the primary. Given the choice, I have lots of things I'd rather be doing than ferreting out hidden or less-than-hidden sexism on one of my favorite websites.
Unfortunately, nobody else seems to want to do it either, and I'm not content to leave it undone. I suppose I could abandon the site and leave it even more masculine so the guys could all talk in their own language, unimpeded by stupid chicks being stupidly offended by completely unproblematic things like objectification and just plain jerkitude. I would almost certainly have vacated the site already if feminism were my pet issue, or if I were more easily offended. (In general, I'm very hard to offend. The fact that people here have succeeded in doing so anyway without even, apparently, going out of their way to do it should be a great big red flag that something's up.) If you're wondering why half of the potential audience of the site seems to be conspicuously not here, this may have something to do with it.
So can I get some help? Some lovely people have thrown in their support, but usually after I or, more rarely, someone else sounds the alarm, and usually without much persistence or apparent investment. There is still conspicuous karmic support for some comments that perpetuate the problems, which does nothing to disincentivize being piggish around here - some people seem to earnestly care about the problem, but this isn't enforced by the community at large, it's just a preexisting disposition (near as I can tell).
I would like help reducing the incidence of:
We could use more of the following:
Thank you for your attention and, hopefully, your assistance.