IMHO if you're not pedalling it is no longer a "bicycle", it is some other class of vehicle (e-scooter?). I have no problem with e-bikes providing a boost, but if you're not doing the work then it should be treated differently. EU 2002/24/EC sounds reasonable:
> Cycles with pedal assistance which are equipped with an auxiliary electric motor having a maximum continuous rated power of 0.25 kW, of which the output is progressively reduced and finally cut off as the vehicle reaches a speed of 25 km/h (16 mph) or if the cyclist stops pedaling.
* https://en.wikipedia.org/wiki/Electric_bicycle_laws#Europe
There are a lot "e-bikes" where I live where are token pedals on the machine to make it "self-propelled", but folks simply use the e-motor and zip along quite quickly. They require no licensing and no insurance AFAICT.
As someone who has a motorcycle license, and had to do a bunch of training and get insurance I see folks on these things as no different to my if I were on a 125cc or 250cc motorcycle/scooter.
I'm happy to have these types of vehicles enter the mix of transportation modes (and hopefully reduce automobile use), but I think the following are needed for e-scooters (née e-bikes):
* a drivers license (like in the EU, where a Category B car license also grants an AM (≤125cc; ≤11kW) license as well)
* some kind of insurance: an add-on rider/paragraph on one's existing car insurance, or a e-scooter policy