Electric scooters that parkingmad references are widely used in Europe and are a convenient mode of transport for many.
Considering that electric bicycles are now extremely common and are regularly seen on the road network, I can see no legitimate reason why scooters should be treated differently.
Before anyone mentions the safety aspect, if they are considered to be a danger to pedestrians, so should electric bicycles be regulated and at the very least, be required to be insured.