I worry more about the guys who have a problem with this than the guys who play female characters. Either:
A) They saw a hot chick in-game, flirted with her, found out it was a dude, and then started worrying whether this meant they were secretly a little bit gay.
Or B) They have trouble separating fiction from reality. They try to make their characters look as much like themselves as possible, and try to believe that's really them on the screen doing all this badass sh*t. They believe that everyone else plays this way, too, and so if a guy is pretending to be a chick, that's gotta be weird. They don't get that most people are better able to separate themselves from that pixelated character than they are.
When I'm playing as Franklin, I don't pretend that I'm actually a black guy from the hood, and when I play as a female, I don't pretend that I'm a girl. They're characters in a story, no different from watching a movie. 98% of the action heroes of the last 70 years have been dudes, and I enjoy seeing a chick kick some ass for a change every now and then. To everyone who voted "yes" in this stupid thing, maybe you should stop judging complete strangers and get your own issues sorted out first...