I take it as a compliment. No matter how a chick looks, the fact that she took the time and courage to try to get my attention, I have to respect that. I say that because I feel the same way about dudes approaching chicks. It kills me when I see chicks complaining about dudes approaching them when they know they would be hurt if no dudes approached them again. Just take it as a compliment even if you're not interested in kind.
Not one type of woman is going to find a dude attractive. There's going to some skinny women, some overweight women, some coke-bottle women, some tall women, some short women, etc. Any dude who expects only attractive women to find him attractive is delusional and probably over-assessing his attractiveness in his own right.
Funny thing is, the same dudes who are complaining in this thread don't see it from the other side. Dudes think every chick they approach thinks they're a catch....dudes don't think that they don't play the "damn, why is this dude trying to get at me" role sometimes.
Peace