Most of these e-bikes can do 28mph if you just unlock them, which is simple enough to do, and to compound issues, a lot of riders like to ride them on sidewalks and rail-trails, etc , where they're zipping through hapless pedestrians and dogs. I mean, you could send someone to the ER if you hit them at 20mph, let alone 28mph. I own an e-bike myself, but I stick to riding it on the street and I think there should be reasonable regulation.