I guess, Moonkin, it really depends on what your definition of rebellion is.
You are probably already rebelling in many ways. You just don't see it as such. And, what adults call rebelling really isn't the same as what kids think it is.
Rebelling against your parents (to a certain degree) is normal, even healthy. It is a way to begin to separate yourself from the childish bonds (not meant in the derogatory sense) you have with your parents, and allows you to begin living your life more independently, as an adult.
It is basically WHAT you choose to do to rebel. If you choose to wreak havoc among the populace, then that is just stupid, and you will have proven that you are not mature enough to begin living your life as an adult.
An adult is conscious of what their responsibilities are and strive to meet those responsibilities BEFORE anything else (before they go out and rebel / party / or whatever). And just so you know, we older ones still like to rebel, too!
Actually, what IS your definition of rebelling? I'd like the opportunity to let you know if you're stupid!!!!

(Oh, just joking - I have a rather dark sense of humour).