Replying to The OFFICIAL "GAY" thread about saying "gay"

I know to some people this is a touchy subject but i was just wondering what everyone's thoughts are about saying "gay".  I go to a school where everyone says "gay", i don't even think about it.  Come to think of it, i can't think of anyone (my age) who doesn't say gay.   It goes right along with, "That was retarded, this is stupid, that's gay."  Does anybody remember when this started or when everyone started saying it?  What do gay people think about this?  Does anybody NOT say "gay"?  Is there a point where you grow out of say it?