Because anybody can use and park the scooters, I would think it's in somebody's incentive to move scooters from pubic sidewalk onto patrolled private property to get scooped up.
I don't know how often scooters ping back to HQ, but it may be often enough for them to log the move from public property to private property.
TBH, I'd also trust an established towing business to handle scooter pickup, because scooter pickup would not be their only line of business, and they presumably wouldn't want scooter shenanigans to affect their towing business.
TBH, I'd also trust an established towing business to handle scooter pickup, because scooter pickup would not be their only line of business, and they presumably wouldn't want scooter shenanigans to affect their towing business.