https://www.cnet.com/news/bird-goes-after-helmet-laws-for-electric-scooters/

Electric scooters operated by Bird -- the largest e-scooter rental company in California -- come with a little sticker that says, "helmet required, license required, no riding on sidewalks, no double riding, 18+ years old."

This isn't just a list of best practices from Bird. They're California state laws for the motorized vehicles, which can travel up to 15 mph. But if you look at the people zipping around city streets on these things, you'll see them breaking at least one rule nine times out of 10.