Just because you see others not wearing a helmet should not effect your decision on whether or not to wear one. The only time I don't wear a helmet is when I am on trainer in the house. I also require my kids where them even if it's just around the development. I don't care what other people think about helmets, and I don't care what my children's peers think about helmets. I know for a fact my helmet saved me from very serious injury if not death and replaced it before I went out for another ride.
I must add that I am opposed to mandatory helmet laws except perhaps for children who aren't expereienced or responsible enough to make an informed decision, allow darwinism to do natural selection as far as I'm concerned.
Ohio doesn't even have mandatory helmet laws for motorcycles, but that's a topic for another forum!