First, if the female photo-threads irk you, as a developer at Obsidian, I'd think you'd ask for their removal. It is certainly not a staple of the industry to have such threads on the official forum(s). When I saw the current ongoing thread, I was actual a fair bit "Oooooh.. kay...?" myself - not that I'm bothered by it, I just thought it was weird, and I wouldn't be bothered by a male version either - although I'd still think it was weird. And while I can see how you'd think they're weird too, I don't see why you'd be bothered by it. But if you are, and you have a solid argument for it, change the board rules.
As for degrading feminists; it's not degrading feminists, it's
feminists degrading themselves. In any forum where you allow the discussion of political topics, there are going to be leanings you don't appreciate. There is no reason you'd consider that
frightening, although if you associate yourself with the people criticism is levied against, I can see how you'd feel insulted. But feeling insulted in that way is probably the first step to questioning your stance; people don't tend to be insulted by facts unless there's some cognitive dissonance going on.
And finally, the Off-Topic or General Forum parts of a forum isn't really relevant for the exchange of ideas relating to specific projects, so well there's that.