I am really confused about this thread. I understand the arguement made by both sides, but if someone swerves into me and my head hits the ground at 25 MPH, wouldn't I rather a helmet cracks instead of my skull? Granted you can wear full kevlar or something if you want to be truely protected, but your head is pretty important, right? Why can't you wear one and still ride as if you didn't?
Just because I ride with a helmet doesn't mean I am more reckless. Wearing a helmet doesn't make me feel any safer - getting hit by a car would still absolutely suck.
I go rock climbing pretty frequently, and this is the same arguement free climbers make. I just honestly don't understand. If there is a chance a helmet can help you, why not wear it?? What exactly is the downside? Personally, I don't see one.
If someone from the non-helmet crowd can enlighten me, I will definately listen. I know there is more to it than this, but other than personal image, and feeling more aware without a 'safety net', I don't understand why someone wouldn't wear one just in case.