First Amendment rights don't apply on American high school campuses. A school in Arizona has banned the USA theme initially intended for Friday night's game because it is “too problematic”.
Instead of allowing the students wear red, white and blue, they were told to “Orange Out”. Should the student's come dressed inappropriately, and one can only assume wearing patriotic colors, they would not be admitted.
The school tweeted that, “Anything perceived to be offensive/racist: green, USA, flags, Trump, etc. It’s not the clothing, but the intent behind it.”
More freedom taken on the next page.