Females, especially younger women and girls, are not as welcome in the Atheist Community as are men. There are indeed many women who are atheists, and many of those are quite active. But to be a woman active in the atheist community, two things are almost always, I think, true: 1) You are not allowed to forget that you’re a woman before you’re an atheist, and not in a good way but in a stereotyped, sexualized, objectified and exploited way; and 2) one of your main jobs as an activist, blogger, writer, or speaker, may very well be dealing with sexism not only generally but in your particular field of interest as well.
I would not have thought this necessary but I was wrong. A “Community” is like a neighborhood. Pertinent to the present discussion, no matter how many female-welcoming (or even indifferent) people live there, and no how many non sexist, non misogynist, pro-feminist, female-friendly places, subgroups, places to go or places to be or things to do there may be in that neighborhood, if many of the street corners and parks and other public spaces are habitually occupied by groups of dick-headed immature women hating misogynists who harass and bother and abuse any women that show up in that neighborhood, then the neighborhood is not welcoming to women. A community is like a neighborhood, and our community (of atheists or skeptics) is a lot like that neighborhood I just described.
And what I’m saying here applies as well to the Skeptical Community, quite possibly because the Atheist and Skeptics communities have quite a bit of overlap.
I have proof of that last point: That female atheists address issues related to sex and sexism more than men. I looked at the last three substantive (i.e., not a random YouTube clip) posts of all the male bloggers at FTB.com and the last six of all the female bloggers (there are so many more male bloggers that I was worried about sample size) and categorized them. Here’s the chart I came up with: