Thank you much for sharing this. That's something I would not have even thought about.
On the flip side of that thinking, I wonder if that could be used to put all the places out of business that are trying to make the UK's 'you must prove age to see porn or nipples law' work, and if that would invalidate their law or just make it convenient that it could be impossible to implement and therefor just a backdoor to ban porn.
A company I worked with in the not so distant past got some real nastygrams.
There's a mountain of patents in that space that are near impossible to avoid stepping on.