This post caught my eye, because I recently when through something similar. My preteen son wanted to start growing his hair long and started wearing hoodies all the time (with the hood up). I looked at it as a phase, because he is a good kid. But then, he got in some trouble at school and starting getting really mouthy at home.
I told him if he 'looked' like a punk, but was really a good kid that was one thing. However when you start acting like a punk, that is another. His 'civil rights' meant nothing to me at that point. Off with the hair and no hoodies. Allowing him to grow his hair and wear the hoodies was a PRIVILEGE extended to him by his parents. The privilege was was taken away because of bad behavior, just like any other privilege.
BTW, you sleuthers who came up with all the links and info..........You're good!