Since I do not know you personally in real life, I had no idea this was about your son. It's tough when our teens make choices we wouldn't have advised them to make. As a mom of a recent HS grad - BTDT.
Anyhoo, I just don't feel this rises to the level that the CHS Admin and BOE took. While it certainly needed to be addressed, I am on the side that feels the punishment does not fit the crime.
I also think it is outrageous that one gets to participate in the sports event, but one cannot walk with classmates at graduation. JMHO