That is a great idea! Not just for students, but for all conservatives. The yellow star sewed on the arm of clothing to point to the first amendment.
Truth be told I got the idea from a gun show at the Cow Palace in Daly City just south of San Francisco several years ago. Several patrons were sporting a large yellow 6 pointed star star that instead of saying “Jude” said “Gun Owner”
There were TV camera crews covering the event(gun show). They turned their cameras off when someone with the star showed up. Of course this never made the news. Go figure.