I have all I can do not to stop and talk to people when I see riders without helmets - to encourage them to wear helmets. I'm afraid my comments wouldn't be accepted too well, but maybe I'm just being a chicken.
I know that when you fall you don't always hit your head, but I'm not willing to take that chance myself. In fact, I probably err on the other side since if I stop for a break on a ride my helmet usually stays on my head. I forget I have it on, and I have been given some funny looks when I walk into a store still "dressed" in my helmet.
--- Denise