I've had a problem with queer student groups too, WyldWyl. Ours, however, has weekly topics and when the local BDSM group comes in for demonstrations, it's always the biggest meeting of the year (that, and "the bisexual meeting," wherein everyone gets drunk beforehand and screams at each other because every year there's one person, without fail, who manages to squeak out 'I just don't see how someone could like pussy AND dick,' before he vomits).

I'm sorry that you experienced what you did among the gay community, and I've definitely seen first hand just how dismissive and mocking people are towards men who identify as bisexual. And it's true that half the gay men I know today came out as bi first, so that whenever any man says they're bisexual, they all roll their eyes in that "been there, done that," way. It's strange that we're part of a community that is on the forefront of academic theory and always spouts all of these inclusive terminologies (LGBT or queer over homosexual, the ideas of sexuality as a spectrum, genderqueer/genderfucking) but somehow it's just as exclusionary and orthodox as the shit we work so hard to undermine.

I find that bisexual girls who want to be "taken seriously" by the queer orthodoxy (lol at stupid terms I'm coining) around here just try to play down the "sex" part of their sexuality. They say things like "I love people, not plumbing" or try to play up that they are open-minded rather than sexually attracted to both men and women. And that's totally cool, and being wide open is a great way to live your life. And I did it, too, but eventually I realized that no, it's not that I'm just floating around all ethereal and equal-opportunity. I want to fuck women, and I want to fuck men (women moreso, and I have not had very much experience with men, but that doesn't mean that I don't actually have dirty, nasty thoughts about them too). And sometimes I want to fuck trans men or women, but have not wanted to fuck a genderfluid person so describing myself as pansexual just seems like a lie, though a rather enticing lie. Point being, I think many bi girls who are serious/active in the community try to find other terms to describe themselves. And maybe it's that they don't want a label, but I suspect it's because deep down we don't want THAT label; we don't want to inherit a label that's so loaded and feels somehow less valid. Bisexual-identified me tried for so long to make friends with this inner circle of beautiful, sapphic lesbianity but was only admitted once I had a girlfriend and stopped correcting people when they called me a lesbian (even now, sometimes I do, sometimes I don't -- try explaining "politically bisexual" as your identity every time your orientation comes up, lol). The idea that I had "proven myself" as a real lesbian turned me off and to this day I don't have many close lesbian friends at school. 'Course, I still love lesbians - nothing for it but to love women who love women.

So, to answer your question, after another embarrassingly long post, I guess bi girls experience all the same mistrust as bi guys, it's just that you probably get more flack from gay males and I get more flack from gay females. And you boys do have it worse, in my opinion, just because the disbelief/dismissive factor is ramped up more, and gay sex is still seen as taboo whereas lesbian sex -- not relationships, or between real people just female-female genitalia -- is much more widely depicted and accepted as "hot." Targeted, actual malice ('I don't date/trust/like bi girls because Bi Girl X did Y to me') I've found more within the queer community, but that might just be because we feel more able to talk freely amongst ourselves than a straight person busting in and hating on us Usually I experience the mistrust outside of the context of people who are hyper-tuned to sexual identity as an issue (so either straight people or just any people who aren't doing "queer" things like being at a queer meeting or in a class or something), so that people will just start talking about bisexuals as greedy or confused or needing to get it over with and come out, already. Just normal, over-a-few-drinks conversations where everyone somehow finds it acceptable to say things like that... Eh. Whaddaya gonna do.

p.s. Latte lefty? How delightful. Disparaging, I'm sure, but there's something to be said for owning up for my own bourgeois sense of progressivism, lol.