Here's a link to a related blog post she wrote.
The section I was thinking of was:
Atheists need to work -- now -- on making our movement more diverse, and making it more welcoming and inclusive of women and people of color.
And by now, I mean now. We need to start on this now, so we don't get set into patterns and vicious circles and self-fulfilling prophecies that in ten or twenty years will be damn near impossible to fix.
What can we learn here from the LGBT movement? The early LGBT movement screwed this up. Badly.
The early LGBT movement was very much dominated by gay white men. The public representatives of the movement were mostly gay white men; most organizations were led by gay white men. And the gay white male leaders had some seriously bad race and gender stuff: treating gay men of color as fetishistic Others, objects of sexual desire rather than members of the community... and treating lesbians as alien Others, inscrutable and trivial.
And we're paying for it today. Relations between lesbians and gay men, between white queers and queers of color, are often strained at best. Conversations in our movement about race and gender take place in a decades-old minefield of rancor and bitterness, where nothing anybody says is right. And we still, after decades, have a strong tendency to put gay white men front and center as the most visible, iconic representatives of our community.
That makes it hard on everyone in the LGBT movement -- women and men, of all races. It creates rifts that make our community weaker. And it has a seriously bad impact on our ability to make effective social change. For instance, the LGBT movement has a profoundly impaired ability to shift homophobic attitudes in the black communities... since those communities can claim, entirely fairly, that the gay community doesn't care about black people, and hasn't made an effort to deal with our racism.
We screwed this up. We still screw this up. We are paying for our screwups.
Atheists have a chance to not do that.
Atheists need to work -- now -- on making our movement more diverse, and making it more welcoming and inclusive of women and people of color.
Atheism is not a movement, it's a philosophical position, indifferent to what type of genital organs you have in your pants, what color they are and how you use them. I'd gladly prefer it stays this way, thank you.
One of the lessons highlighted in the thread "Less Wrong NYC: Case Study of a Successful Rationalist Chapter" is Gender ratio matters.
There have recently been a number of articles addressing one social skills issue that might be affecting this, from the perspective of a geeky/sciencefiction community with similar attributes to LessWrong, and I want to link to these, not just so the people potentially causing problems get to read them, but also so everyone else knows the resource is there and has a name for the problem, which may facilitate wider discussion and make it easier for others to know when to point towards the resources those who would benefit by them.
However before I do, in the light of RedRobot's comment in the "Of Gender and Rationality" thread, I'd like to echo a sentiment from one of the articles, that people exhibiting this behaviour may be of any gender and may victimise upon any gender. And so, while it may be correlated with a particular gender, it is the behaviour that should be focused upon, and turning this thread into bashing of one gender (or defensiveness against perceived bashing) would be unhelpful.
Ok, disclaimers out of the way, here are the links:
Some of those raise deeper issues about rape culture and audience as enabler, but the TLDR summary is:
EDITED TO ADD:
Despite the way some of the links are framed as being addressed to creepers, this post is aimed at least as much at the community as a whole, intended to trigger a discussion on how the community should best go about handling such a problem once identified, with the TLDR being "set of restraints to place on someone who is burning the commons", rather that a complete description that guarantees that anyone who doesn't meet it isn't creepy. (Thank you to jsteinhardt for clearly verbalising the misinterpretation - for discussion see his reply to this post)