From what I can see, this law hasn't been tested, but given that my scooters max speed is 11mph, I'm not worried about killing someone at the moment.
In the Netherlands, segways are treated like mopeds (and these electrical scooters are quite similar to segways). Which means that you do need moped liability insurance and you cannot use the sidewalk.
If you get involved in an accident with either a pedestrian or a bicycle, then because you are using a motorised vehicle, you are assumed to be liable for the damage even if it is not your fault.
Then by default you are liable for all of the pedestrian's costs, even if it was not your fault. No ifs. Just any damage that results from the accident.
Unfortunate since the size of a bicycle can be a drawback.
[1] http://www.legislation.gov.uk/ukpga/Will4/5-6/50/section/72
[2] https://www.theguardian.com/uk-news/2015/oct/12/uk-hoverboar...
Legislation needs to catch up. There is a European effort underway to create safety requirements and test methods for Personal Light Electric Vehicles that would seem like a good start [1]. Maybe we'll leave the EU just in time to not get the benefit :)
[1] https://www.din.de/en/getting-involved/standards-committees/...
Apparently it is currently unclear even whether and where roller skates are legal, and it is occasionally claimed that wheeled bins are technically illegal on pavements, even though they are provided by local authorities and people are expected to put them in front of their houses on bin days.
Of course, it's unlikely you'll be stopped by the police for using an electric scooter in a considerate way. But the lack of official approval is bound to prevent widespread use.
Meanwhile, feral youths, without helmets, ride unlicensed, uninsured pit bikes across roads, pavements and other people's private land and the police have no resources to do anything about it. On the other hand, a middle-class middle-aged gentleman on a scooter would be much easier to catch, so do be a bit careful if you decide to defy the law. If you see the cops coming, run for it. They almost certainly won't shoot you.
When you talk about electric bikes and scooters the picture formed in the heads of the people who run nanny-states looks a lot like mopeds in Dehli.