During my first three years of high school, we didn't have to wear uniforms. Then, we were told that they would be introduced in our fourth and final year there, but that we wouldn't have to wear them as we weren't going to be there for much longer anyway.
Several months later, they retracted that comment, and made us all get uniforms for our final year of high school. >_>
About whether I'm for or against it, be it for the whole high school experience or for just the one year in my case, I'm completely against it. I'm not a robot/doll, I'm a human being. They've already taken enough freedom away from us, so why add to it? ¬_¬