The moderators' response to "Mark" rubbed me the wrong way, too, but let me try to come in on their side.
I don't think women form female-only forums or other groups because they're sexist. If they had issues with abusive men in the past, then an all-female forum is a place where they can feel safe from that sort of abuse. Sure, dealing with your problems with the opposite sex by hiding from it probably isn't a great long-term solution, but for some, it may be a necessary step.
OBleedingMe made some comments about women, power, and equality. I think the history of feminism looks kind of like a pendulum that's gradually settling towards the center. Women of my grandmother's generation were supposed to serve the husband and the family. Women of my mother's generation (the Boomers that that website is for) swung the other way - feminists had worked so hard to get them the right to have power and control that you felt guilty if you didn't take advantage of it. I think the women of my generation are, in many ways, the first to have a real choice - I can be an engineer if I want to, but I can also choose to stay home and raise my kids.
My point is, I think some (older) women are still reacting, and sometimes overreacting, to domineering men. They used to bother me too, for being anti-equality, but now I try to cut them some slack. They're part of a generation that did a lot of fighting so that I could choose to be submissive if I wanted to.
And KittenToes: kudos for speaking up! I think you did a good job, so I'll not chime in at this time. I wouldn't want to overwhelm them with our open-mindedness: if they opened their minds too far, their brains would probably fall out. 😉