[Modernman]

Schools are paid for with public dollars - the kids' only rights are to do as they are told or get out and pay for their own education.

Not true, actually. Kids don't lose their rights once they enter a school. A dress code or uniform, however, is quite constitutional.

[Libertina]

All public funds have strings attached. I don't think school kids have the right, or should have the right, to unencumbered "free speech." Or dress. Or behavior. However, I understand your point that they are demanding (and getting some ACLU back up) for "rights."