Seattle has a mandatory helmet law for all ages, just like the only other place to have a failed bike share (out of hundreds around the globe), Australia. These silly laws cause failure on two counts: they force customers to find a way to get a helmet and they imply that cycling is dangerous.

For what it's worth, motorists are twelve percent more likely on a per hour basis to suffer traumatic brain injuries than cyclists and pedestrians are twice as likely. Where are our mandatory helmet laws for motorists?