First even wearing a helmet will not help with a common sense approach to riding, any bike. Your body doesn't do well in absorbing impacts.
i always wear a helmet and will never be without one. But there are some out there that want to look "cool" and wear those shortie helmets. Well you might as well stop by the local funeral home and pick out your future home, they even offer custom colors and powder coating. Worse yet, pick out your wheelchair now when paralyzed from the neck down.
Remember even a helmet cannot replace what is inside it to assist with proper/safe riding. I was told at a very young age to always ride like you are "invisible" and you will live longer. It has worked for me so far!