I can see a problem where if you agree they can do it...then a number of folks will pull out odd-ball symbols to wear...and demand the same respect. High school graduation is for one purpose...walk in and get the certificate and walk out. It’s not a symbol or worth turning into some life-transformation activity.
I didn’t waste my time going to mine. They mailed my diploma to me.
Good point and very sensible. It would seem that an exception could be made for the military because of the military's unique contributions, but then where would it stop?
As you said, every odd-ball in the graduating class would then want the same freedom. An anti-war activist might want to wear a "stop all wars" sign around his neck. The president of the drama club might want to go dressed as Shakespeare. Sounds far-fetched, but remember you're dealing with teenagers.