Ok I'm probably repeating points here as some of these posts got pretty long and I started skimming, but nevermind.
Firstly, when guys find out someone is a girl here and ask for pics, I honestly can't remember a time when it wasn't a joke taking the piss out of the perecption of guy gamers on the net. It's a crap joke, and was probably crap the first time someone told it, let alone the thousandth time, but it's a joke all the same.
Secondly, I don't see GAF as any more hostile to women than society in general, especially when you factor in internet anonymity. I know so many people (aquaintances, not friends) in real life who literally cannot talk about a girl without mentioning how they look, and what they'd like to do to them etc. Honestly, it'd be impossible for me to say something positive about a girl to them without a response of "You just want to do her" or something. And these aren't gamer geeks who've never had contact with a girl. These are "cool" people, the people who would ridicule you within a second of finding out you post on a gaming board. So the fact that it happens on GAF really shouldn't be surprise.
Then there's the internet anonymity that I've mentioned. Forget girls for a second, just think about anything on the net where you're talking to people you don't know. How many assholes have you played on Xbox Live? How many times have you seen someone posting some shit about someone's picture and thought: "They'd never dare say that to him in real life"? The internet has allowed people to say what they think, when perhaps they wouldn't in real life, as there's no real risk involved in it. It's also allowed people to be crueler, much crueler than they would be generally. Only the complete assholes in real life tell you how ugly you are with no provocation, and these people are rare (much more so than the guys who's only way to interact with or talk about girls is sex). Come on the net though and it's rampant. Why? Is there something about the net that attracts those assholes far more than nicer people? No. It's because you can't see their reaction. You're not going to feel bad, so you feel more justified to say whatever you like. Look at road rage. Do you know why road rage happens, but if you almost walk into someone in the street you don't get angry then? It's because you can see their reactions. When in a car, the other person is basically anonymous, just like the net. You can't see their face, so you can't tell if they're sorry, if it was a mistake etc. When walking down the road though and almost walking into someone, they smile slightly at you, or they say sorry, or oops, or whatever.
Thirdly there's the fact that most GAFers aren't assholes. Yes, there's an element that can be highly derogatory towards females. Such is life, I'm afraid. And, not surprisingly, these people are noticed more than those of us being nice, or not caring. Who did the girls know more at school? The nice guys who never said anything to them, or the assholes who hit on them/bullied them at every opportunity?
Finally, there are plenty of girls here who I don't see getting much personal shit. Now obviously I don't read every topic or post, so I could be wrong, but Azala, Be-Ah-Hui, Calista (or whatever name she has now) and Dragona come to mind as examples. At the same time, there are plenty of guys who do get personal shit. Olimario is probably the most obvious example, Black Stallion (though he's really after it), way too many people to name who some like and others don't (Mike Works, Drinky etc.). Are they more deserving of that shit than the girls who get it? Probably for some, but not all (and the number of guys to the number of girls would suggest that should be the case anyway).
So basically when it comes down to it, I guess I'm saying blaming GAF for these things is probably right, but blaming GAF (or gamers) over other places is wrong, because this shit goes on all over the place. And the larger a community gets, the more it's likely to be noticed, because you can bet your ass for every 10 mostly good members who join, it'll be the one bad member who'll be noticed.