I saw a performance of the Nutcracker once featuring a dancer who had the waistband of his dance belt pulled halfway down his rear. It looked gross under white tights. Obviously he wasn't used to wearing a thong style dance belt, but during a performance wasn't the right time to learn.
The nice thing about this forum is that readers can read both opinions and make up their minds for themselves. Whenever I've tried to lessen the pressure from a too-tight thong, the stupid thing has ended up bunched up and less comfortable than before. You don't have to pull a waistband as tight as it will go. A thong that sounds a high C when plucked is too tight, but be careful how much you loosen it. Your mileage may vary.[/i]