I'm female and I have a problem with it when I've seen it used to take advantage of others/gain attention. I guess that makes me one of those women "making an accusation", but I've seen enough trash to have a valid opinion on the subject.
Example: Barren's chat, back in the day anyone? LOL but serioulsy, I have no clue if it still happens there or whatnot, but it was annoying. It would have been annoying had it been any superficial thing that someone uses to have an advantage over others, rather than putting in the work and skills it takes to get what you have. My main was female because it was fun, but I never insinuated I actually WAS female unless guildmates found out or were curious or what have you. After two years, I did notice a trend that after men I played with found out I was female, there was a definite change in communication styles, discussions, inclusion (they wanted to include me more than they had before, were more tolerant of mistakes, etc.) and interest shifts.
So I'd like to think that it simply "doesn't matter" how you identify, and it's great to hear so many people here say they don't care, but any male or female in an opposite sex dominated arena deals with issues of attention because they stick out amongst the community.
Edited to add that in the case where the gamer is identifying their sex to gain attention for streams specifically, and the viewer choose to support them because they're female doesn't actually bother me. If you're mediocre or suck and are using the female tag to get attention, that's your perogative. I just dislike those that use something as superficial as their gender to make the rest of us look bad.