I've seen plenty of stickers on cars that are heterosexual in nature. I'm very surprised you haven't. I don't consider stickers on cars as "shoving" anything into my face, so long as they are not obscene. Shall we outlaw stickers on cars? Is this your position?
"You're gay. Fine! Why not shut-up about it?
I didn't post this article. It's something that people talk about... look at you, talking about it right now. You actually came to this thread to talk about homosexuality.
"Besides, what gives you the right to co-op the colors of the rainbow? "
Is this really an issue? Anyway... rainbows can mean whatever you want. An artist chose rainbow for some banners or something at a pride march to symbolize diversity, it caught on. It is not preventing you from using rainbows elsewhere.
When you and I apply for the same job, do you think it would be appropriate to say, "Oh, by the way, I'm a homosexual?"
If I were to put a rainbow sticker on my car it would have to say, "I'm not a homosexual, I just like rainbows."
Is this really an issue? Yes, you made it one.
Name 'em!