Comment by dgunay
I don't personally care whether bikes (or scooters) ride on the road or the sidewalk, but my one ask is that:
If they ride on the sidewalk, they should behave like pedestrians. That is, do not blast into the crosswalk at 20mph (impossible for drivers to safely check for in most environments), do not randomly enter the road from the sidewalk, pass pedestrians at a respectful speed and distance, etc.
If they ride on the road, they should behave similarly to motorists. That is, actually obey stop signs (rolling stop, or even treating it like a yield is okay), and actually obey traffic lights.
I'll even tolerate transitioning from one to the other at appropriate traffic stops. Just please don't get upset if I almost run you over for abruptly taking right of way you never legally had.
Biking while respecting traffic rules dramatically increases mortality rates.