You have an issue with speed and size of someone on the footpaths, I could run fast and cause more problems than someone on a scooter on the path. Besides its not like Scooters will ever be that popular because people love transporting stuff around in their cars and they need/expect a certain level of protection from the elements which scooters, bikes and motorbikes will never exceed. Its a bit of a storm in a teacup which is why the UK police are not prosecuting electric scooter users at the moment.