Yeah totally! That’s a path that regulators often take rather than banning something. It’s all part of the same root as I see it. Removing non-obvious dangers or turning them into obvious ones.

You’d still need to satisfy the requirement that they don’t pose a threat to non-occupants though. Pedestrian and bystander safety is a thing. Might be taken care of by limiting the max speed.

This post is known by the state of California to contain cancer causing elements.

Those planes are allowed to be flown for specific testing purposes only. You cannot fly passengers nor even cargo with them. And each flight crew member must have a very specific, essential role. You can't fly e.g. a tourist and call him "mission specialist" to get around the rules.