I don’t play WoW, but I find this to be true for most online gaming. I know I refuse to use a mic and talk while playing most online games. I’m not saying it is that way for everything, but for some.
I play WoW every now and then, and I usually play a male character for the exact reasons listed above. I don’t want other players to assume I’m a girl and therefore bad at the game. (I’m bad at the game, but that is totally unrelated to my gender!) I don’t want some skeezeball to say, “You’re the first girl I’ve met who plays WoW, that’s so sexy.” I don’t want any attention, negative or positive, for being a woman. I just want to play the game in peace.