12mph is way too fast for a sidewalk. (Thus these scooter sharing startups will die.) If an olympic athlete who runs at 12mph did his daily run on a sidewalk,

12mph is way too fast for a sidewalk. (Thus these scooter sharing startups will die.) If an olympic athlete who runs at 12mph did his daily run on a sidewalk, people would be really, really angry. 12mph is fast. A police officer would stop him.