You poor, unfortunate attractive people. Life is hard huh?
There is one thing I've seen overlooked here, unless it was in one of the longer posts that I was being too lazy to read. People tend to want what they can't have.
So making it clear that you're not interested will only make some people want you more. Why is that? I have no idea. People are crazy. That's my best answer.
Who has heard of "playing hard to get"? I think most have. There is some truth to it. Although, I don't agree with it. It's a silly head game and I don't put up with those personally. However, we should all as God's children value ourselves enough to be genuinely hard to get...not just pretending and playing a game.
So what is the solution? You could lock yourself in your house and never leave...or just simply say 'bye" and walk away when someone is flirting with you... Of course that would just make some want you more.
Darned if you do, darned if you don't.
There are much worse "problems" to have.