I have avoided approaching people who I think are beautiful in the past but usually it is because I feel insecurity about myself. I have no animosity or bitterness about someone because they are thin, hot people (even if I joke about it from time to time), but I am afraid that being a woman of curves that I may get rejected.
It is something that I personally have to deal with. Imagine my surprise when one of the beautiful couples showed interest in me. At first I could not believe it, and then I realized that my own opinon of myself was obviously harsher than that of others.
So my answer is this - I do swing with the 'beautiful' people if I am attracted to them and I enjoy their company. THere are lots of beautiful people with ugly personalities and lots of 'ugly' people with beautiful personalities (and vice versa). I like to take it on a case by case basis. Just as I hope people do with me.