Good thing we have these experts to let us know that helmets protect the head. If they want to raise awareness of helmets or make better helmets that's fine but I stop short of creating more laws. Anyone not wearing a helmet today is of age and a casual rider around town or just dumb.
We can get on New Yorks case. They provide citibikes to any random tourist in a place with possibly the worst cycling infrastructure of any major city and i dont believe they come with helmets. You'd have to be mad to try and ride around the nitty gritty there on a rented bike. Makes me wonder who the average citibike rider is and where they go on them.