Walking around sidewalks with younger kids is now dangerous from the groups of teenagers riding on these with little concern. In the same afternoon I saw a young kid get hit by a car for not following traffic rules. While its required to wear a helmet in SM no one was. These things are littered everywhere in paths just lying on the ground.
I get they are great and if we could rely on the people or the company to enforce the laws and make it a better experience I'd be in favor of them because they are convenient. I just don't believe that will happen.