Ozonation - We have several hundred pages of posts explaining why wearing a helmet may or may not be a good idea, so I won't get into any of those details. I will just point out that, at the heart of the matter, it simply isn't anybody else's business whether I wear my helmet or not. That by itself is enough to oppose helmet laws: I am not harmed or affected by another person's decision to wear a helmet or not, so I really have no justification for forcing him to conform to my beliefs one way or the other.