I'm not sure where the line between "hobby" and "professional" lies when it comes to linux distributions. Many of them are nonprofit but not really hobbyist at this point. Debian sure feels like a professional product to me (I daily drive it).

We regulate how a hobbyist constructs and uses a radio. We regulate how a hobbyist constructs a shed in his yard or makes modifications to the electrical wiring in his house.

I think mandating the implementation of strictly device local filtering based on a standardized HTTP header (or in the case of apps an attached metadata field) would be reasonably non-invasive and of benefit to society (similar to mandating USB C).