Most Helpful Guy
Why do you want to wear them? So you don't show a line under your jeans? If most of the girls in your school are already wearing them, then why would you be singled out as a slut? Most girls that told me about thongs have said unanimously that they are not very comfortable (Maybe it's a fabric or material thing, I don't know). You should make up your own mind. Be aware of the real reason why you want to wear or not wear a thong.
The choices I have made to impress others to feel better about myself usually end up making me feel sad and stupid. Choose what you know will make you happy, rather than what you think will make you happy. If you're wrong, acknowledge that the choice you made did not make you happy, and move on because it's okay to make those mistakes. Understand that you have the power to change how you feel by yourself, and that you are at a huge disadvantage if you give that power to someone else.1
Most Helpful Girl
That's entirely up to you. If you personally feel comfortable with wearing them, wear them. It's just a type of underwear, it really shouldn't be a big deal.
Also, people who label others as sluts for their choice in clothes are really not worth being worried about. You should ignore those people entirely.2