Gay people shouldn't worry about the expression: "That's so Gay".
Neither should people insult or try to marginalize Gay people.
One of my pet peeves is anti-gay hatred.
I don't like it.
I have friends who are Gay.
From the beginning of time there have been Gay people. There will always be Gay people. They are your brothers and sisters. You can hate them if you want, but it is stupid and counterproductive to do so.
To the flamboyant Gay person I would say: put away your tu-tu, and don't march in the parade.
To the Gay hater I would say: shut up and get used to it. They're here, they're queer, and their not going to disappear.
Personally, I wish there were more Gay men in the world, because that would mean more girls for me.