Regulatory moat is a possibility, where an established player can coerce a city to impose an expensive compliance guideline that prevents upstarts from entering.
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.
We can get through this transition period and put in place reasonable rules that yes will eventually become commonly complied with. License scooter drivers and or the scooters themselves. Reserve one street parking space per block for scooters and you probably could cram 20 of them in there. Lots of things can be done.
Which isn't to say I want to regulate them more. It's just sort of pointless in a city where the populace doesn't follow the existing rules, and there's no political will for law enforcement to do anything about it.
Are you seriously saying that multiple times per week, you are knocked over by a bike?
I think you are suffering from a bit of car blindness: https://blog.sfgate.com/bicycle/2018/04/27/invisible-cars/
https://qz.com/1257151/this-electric-scooter-mayhem-sounds-j...
The right way to solve the problem of too many electric vehicles on the sidewalks is to charge owners rent.