If you see nothing wrong with moving websites into the category of buildings, aircraft, medical devices, etc... what are you doing on HN? The entire ethos of this community is free and casual, sometimes entrepreneurial experimentation with networked software. It may be necessary to end that for the greater good, but that’s not something to take lightly.

US law has surprising respect for the hacker ethos, so that even in highly regulated activities, there is a much less rigorous licensing regime for small-scale practitioners. . Experimental aircraft certificates, private pilot licensing, amateur radio licensing, etc. You can build yourself a car, cook food for a party, etc. without being subject to the laws about those activities under corporate mass manufacture.