One issue I've noticed with these new forms of electric wheeled transport (longboard, transverse and longitudinal one-wheelers) is that the people riding them often don't come from a sports background. They aren't "safe" devices exactly - it takes skill to pilot them, and when things inevitably go awry, it takes good reflexes to avoid damage. Novices to action sports often throw their arms out to catch themselves whe…
That said, I think the electric unicycles are much more dangerous. But at least they make it clear that it's not a toy. I passed on the Onewheel because of the random ejection complains I've seen online (which is likely fueling this regulation as it's been known for several years now). While wrecking was not fun, at least I did it to myself. I'd be really upset if I felt like the board did it to me.