I did when I was younger. I used to be rather disproportionate, in regard to my chest-to-rest of my body ratio. People spread the rumor that I stuffed my bra. It was completely untrue and really hurt my feelings when it got back to me. I know it doesn't seem like a big deal, but to me it seemed like a form of lying, and the thought that people I liked and respected might think that of me broke my heart. When I was 17, I got reduction surgery because of back problems and because I was a competitive runner and dancer, and I guess the rumors stopped?
As a result, though, I never start or spread rumors. It's mean and hurtful, and there's no good reason to do it. If I have an issue with someone, I take it up with them rather than go behind their back.