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Does anyone think electric motorbikes are going to *improve* this situation?
Short answer is of course no; an 'electric motorbike' is no different to a MX or dirt bike in a legal sense. Just as MTB riders, councils and their park rangers take a dim view of petrol bikes on trails intended for walking / horse-riding / MTB, electric motorbikes need to be considered the same.
Whilst I 'get' the pedelec category of ebike, and there have been a couple of statements earlier acknowledging that they could be useful on MTB trails (DH self-shuttling and people with buggered knees etc.), electric motorbikes seem to be simply another option for those that would ride unlawfully on petrol powered motorbikes anyway. Not so much the tech as the person on it, but that's the same with bikes, cars, poodletronics and any other vehicle for that matter.
The only legitimate application I can think of for high-power electric motorbikes is as a replacement for petrol powered motorbikes on the road, in places like California where they are mandating the use of electric vehicles to reduce emissions. However, electric motorbikes would still have to comply with relevant design rules, have all the mandatory safety items (lights, indicators, horn and so on) and be a registerable vehicle in the same way that petrol powered motorbikes are.
I'm interested in the technology because electric vehicles have to be better than fossil fuel power, but I don't care for the early adopters who want to push the boundaries with flagrant disregard for the law and also put others at risk.