I'm assuming you mean classmates (teenagers) and not adults. I got a fair amount of teasing in school, but it wasn't about my hair. If I'd have been any more different than I was, it would have been much worse, though. I think people assume girls will do funky stuff to their hair, but that if a guy does these same (or similiar) things, something is wrong with him and consequently tease him.
My advice is that high school passes quickly. Don't do anything to get into trouble with your school, but don't back down from bullies. If it gets really bad, or you think someone is going to hurt you (or chop off your hair, which IS assault), let an adult know about it.
I stood up to quite a few bullies in my day. I'll admit to resorting to physical violence a few times, but don't recommend it, as it can get you into serious trouble. As a girl, people tended to take my side of things, especially when the bully was a male. I slapped a bully in front of my whole class my Junior year and didn't even get spoken to about it!
Don't change your hair for anyone who has no authority over you. When it's your parents, the school, work, there is a legitimate reason to comply, but don't be pushed around by people your own age. Just be safe. Hopefully these kids are full of hot air.