That extra speed makes them scary and dangerous, and the people riding them never seem to be considerate of the people they’re sharing the sidewalk with. Not quite as bad as bicycles on the sidewalk, but approaching the same category.
IMO we should be repurposing roads not aggressively to make room for cyclists and other modes of transportation like scooters.
If scooters are too slow to be safe in the bike lane, make an additional scooter lane and remove some free automobile storage on public property - which is not in fact a birthright.