Yes. Sometimes. I don't flaunt the fact that I'm a girl, and I don't want people to flirt with me in games because that's not what I'm there for. I wanna be treated like I'm no different from any other gamer, because I'm not any different.
With all that said, it should be clear that I don't draw attention to myself, right? My username doesn't overtly state that I'm female or anything. When I use a mic, I don't talk about stupid stuff. I'm focused and into the game. Yet, sometimes, when I speak, guys just lose it. Either they suddenly start asking me a bunch of questions, or more rarely, they get abusive and vulgar.
There was a guy last week who, immediately after hearing my voice, demanded I add him to my friends list. Throughout the game, every few minutes, he'd ask if I'd added him yet. After the game, he kept asking for personal details (where I live, my real name, etc.) That sort of thing annoys me.