Yes, though I can hardly blame people for doing it. They should be used in bike infrastructure instead, but at least in the states there's almost no safe bike infrastructure except in a handful of cities.
Choosing between the sidewalk with pedestrians and the road with cars, I mean it's obvious right?
And some of the scooter companies have developed technology to detect when people ride them on sidewalks. Mandating its use or fining the rental companies for rider behavior would help with this problem.
