We shouldn't be against the manufacturers and importers because these bikes are legal at any speed on private land.
Legal to ride and own, but not legal to sell. A motor vehicle sold in the EU must be approved by an authorised body before it is placed on the market, unless specifically exempt. A bicycle or pedelec must satisfy the requirements of the relevant EN standards. The contraption we're discussing isn't approved as a motor vehicle, or capable of meeting the EN standards for a pedelec, or exempt from those requirements, so it is a criminal offence to market it for sale anywhere within the EU. You can't just go around selling potentially unsafe products with the justification
caveat emptor.
Just by looking at the pictures, there's clear evidence that the manufacturers don't give a toss about safety. Schwalbe sell a variety of tyres that are ECE-R75 rated, and so have been tested for continuous powered use at speeds up to 50kph. They haven't bothered and have instead have fitted standard tyres, rated to 25kph. ECE-R75 tyres would still be totally inadequate for a vehicle with a top speed of 80kph, so fitting standard bicycle tyres is just egregious. Fuck it, it's only human life we're talking about.