They did this at my graduation and I lived in a really secular town. No one really cared and most just saw it as tradition. I tend to let nihilism influence my view of religion; it's all arbitrary, and I don't have any true absolute knowledge, so the flavor of perception that people choose for their brief existence doesn't really bother me. I don't even include the "as long as they don't bother other people", because people will bother and kill each other regardless of what they believe. People on both sides of this conflict, fedoras and theists, love this conflict, because it gives weight to their delusions of mattering.