Should I and plenty other boys have been prevented from wearing black band T-shirts in high school because we may have been satanic?
The devil you say?
If teachers and the administration thought you were being disruptive by doing so, they would have a good argument. However, in most places that would not be the case.
The SCOTUS in past decided that in most places, local standards defined what was pornographic or not. Perhaps it is time for them to reach a similar decision about schools.
As it is today, one hothead and their family can disrupt an entire school through litigation that goes federal, be it over school prayer, what is published in the student newspaper, what they wear, who they want to take to the prom, etc., etc. But enough is enough. The SCOTUS needs to do something to end these endless nearly identical federal court cases.