alt Hacker NewsA 15 year old on a bicycle can easily do 15mph, and even 20mph is easy enough if they are willing to pedal for it. The real problem is that something capable of doing 15mph+ shouldn't be on the sidewalk in the first place.
There are multiple things going on in these situations, and rarely is it just one thing a quick simple ban on ___ will actually fix
Not sure if this is regional or another sign that I'm old.
When I was in elementary school, we were already taught that we ride a bicycle in the street and follow traffic rules. That included things like traveling in the correct lane for the direction we are going and observing stop signs and traffic lights. Also, as we got older, using things like turn lanes just like a motorcycle should do.
We were also taught tp walk it on the sidewalk/crosswalks as a pedestrian when the conditions were too complex for us to safely ride with traffic.
Even ignoring the peril to actual pedestrians, I have seen so many near-accidents in more recent decades from people violating these rules. Riding on sidewalks and/or against traffic flow (wrong side of the road) so that they "come out of nowhere" into traffic, ignoring traffic control lights, etc. Adding the electric speed boosts has just made these reckless things wildly more dangerous.