I guess if people are going up and down a country lane at 8 mph without helmets and there are no cars allowed on the street, that's okay. I agree, there are some instances when not wearing helmets is probably okay, but I have a feeling that people who opt out of helmets aren't being selective about when they are opting out. It's just like the seatbelt story. It's a habit. you're not going to use the seatbelts on the interstate and NOT buckle up when you're just driving to the park.

I just saw the picture of the little boy's helmet broken in 3 places after a vehicle ran over his head. The boy is alive thanks to the helmet. One of the reasons we wear helmets when "we don't need them" is to model this safe behavior to children.