I agree with your comment, but this is the law already.
I'm strongly in favour of more scooters/e-bikes in the city (and fewer cars), and I'm also strongly in favour of writing tickets for anyone who is antisocial enough to ride on the sidewalk.
If traffic cops spent a week or two rigorously enforcing the law, I bet you'd see a sharp drop-off in this behaviour.
(However given the number of cars, including cop cars, that I see blocking intersections after the lights change, I'm not sure that there's really a commitment to enforcing traffic laws in SF, even where this would be a revenue-generating activity).
I'm strongly in favour of more scooters/e-bikes in the city (and fewer cars), and I'm also strongly in favour of writing tickets for anyone who is antisocial enough to ride on the sidewalk.
If traffic cops spent a week or two rigorously enforcing the law, I bet you'd see a sharp drop-off in this behaviour.
(However given the number of cars, including cop cars, that I see blocking intersections after the lights change, I'm not sure that there's really a commitment to enforcing traffic laws in SF, even where this would be a revenue-generating activity).