It's more dangerous to ride them on streets, even on bike paths. Who cares if it's illegal? I'd rather ride on the sidewalk then get hit by a car trying to pass me at 45 mph.
The pedestrians that are endangered by relatively high speed motorized vehicles riding on sidewalks care. It's totally reasonable for you to not want to ride a scooter on the street, but that doesn't entitle you to break the law and make sidewalks less safe for others.
The chance of getting hit from behind likely decreases on the sidewalk, but the chance of getting hit from turning vehicles increases greatly. The chance of being hit by turning vehicles is higher in general as far as I remember, too.
It's more dangerous to ride them on streets, even on bike paths. Who cares if it's illegal?
Who cares if it's illegal? Pretty much everyone else.