This may well have been addressed in posts I didn’t see: one thing that always strikes me when any kind of ‘fake nerd girl’ discussion happens, be it comics or games or cosplaying or whatever, there are two ways that the women in question are denied authenticity, and I see one talked about much more than the other.
If you’re thin, conventionally attractive, and feminine-presenting, then you’re a — to use the most common example — a fake gamer girl. Your gaming is the thing about you that can’t be real.
If you aren’t thin, conventionally attractive, and/or feminine-presenting, then your point of destruction becomes that you’re a fake gamer girl. Which is a different, yet equally toxic, way of thinking.
I’ve been a nerd my entire life and I’ve never, not once, been accused of being a fake nerd, because my status as an unfuckable ugmo has eliminated me from the ‘girl’ category and therefore it’s not an issue.
Destroying sexism in nerd circles can’t just be about getting boys to accept that cute girls play games and read comics; it has to be about educating them that women — all women, not just the ones they want to fuck — are human beings, just like they are, with as diverse a range of bodies and interests.
(and, as a corollary — the thing you dislike about fedora/brony/nice guy dudes should not be that they have bad skin and double chins and bad fashion sense and that they aren’t attractive, because when you do that you throw a lot of nerd girls under the bus and that’s really uncool k)