Nonsense, he has no such right. No right to have your picture posted exists.
It's bad enough to have people trampling all over real rights without inventing rights which do not exist.
True, and an important point to make...
but maybe he has a liberty interest (or possibly even a property interest), and a government entity is depriving him of it without Due Process or just compensation. =^)
Well, yes and no. If the school has made a habit of letting the Seniors pose in all sorts of ways, with their pets, their cars, etc., they ought to have to accept his choice as well.
You are committing a fallacy of assuming the poster was talking about Constitutional rights. He was talking about the notion of a right in the softer, more liberty-oriented sense, I'll wager, but of course it's no fun giving someone the benefit of the doubt when you can leap to criticism instead.
Please tell me what rights we have as Americans please.
"Nonsense, he has no such right. No right to have your picture posted exists."
But if he were gay and wanted his grad picture to be of him with his buttless leather pants on some Federal judge would declare it a right.