I used to work for neuron a couple of years ago and apparently everyone needed a licence to use them but what happened more often than not is a parent would hire the scooter on their account and give it to the kid, also the amount of people who we caught riding them two up was ridiculous, they weren't best pleased when we would drive by and remotely turn them off, but I agree as a trial to get people out of cars it's a failure.
Also the unregulated ones are stupid, most of them will do 40mph or more which doesn't bode well for when you come off