Working in the medical industry I have known a fair number of gay people, and I can't remember any of them playing games. Not saying that none do... but somehow I think their numbers might be small.
I would tend to think the gay nomenclature is more just people trying to be offensive, especially if it bugs you.
I know someone who always did that, and he was far from being gay, he just liked being offensive and making people mad, it gave him a sick little rush, he would always laugh if he pissed someone off enough to actually leave.
Just my perspective. I tend to ignore flames when I am gaming... I'm usually too busy being killed to worry about what some 15 year old is saying.