He was stupid; purposefully riding without a helmet was pretty dumb. But I actually agree with him. The problem with both the helmet and seat belt laws is that the only person at risk is the one not wearing one of the aforementioned equipment. American government is intended to allow freedom, essentially meaning that you can do whatever idiotic thing you want as long as it's not going to hurt someone else, which is why things like murder and theft are illegal but licking a spark plug is not. Laws are not supposed to keep us safe from ourselves, they're supposed to keep us safe from others and others safe from us.
Issue being, sometimes we forget to put on a seatbelt. Or perhaps we lost our helmet. And we end up needing to pay a ticket because we had the audacity to put ourselves, and no one else, at risk, probably just because of forgetfulness or something. I don't see that as in line with the constitution or generally okay on principle for a country that was formed specifically with freedom in mind.