What purpose do you think this rule serves?
I’m probably a bit hard right on this but standards of dress and presentation are a part of my upbringing. The USAF was very determined on this.
My high school had dress codes. This boy knew the code and decided he would tell the administrators to get bent.
That is his choice. He cannot say that to the entire school.
He gets his diploma in the mail. I don’t care if he is the next Charles Barkley or not.