They'll simply pass a law making disguises/obfuscation illegal in public.

Because why would anybody who's not a criminal or up to no good have any issue with the tracking, right?

already a law where i live

https://law.justia.com/codes/georgia/2010/title-16/chapter-1...

for historical context, this was not passed historically to combat the KKK, who have a storied history in this state. Nor was it passed under national security hysteria. It was passed very recently, to arrest guy fawke's mask wearers at the Anonymous Million Mask March.

Plastic surgery will likely remain legal. I could see a future where people avoid recognition by simply changing their features like a custom video game character.

Plastic surgery might remain legal, but you would likely be required to submit before and after photos. Making it pointless.

If the tech reaches the point where you can do it at home, that won't matter.

You can trivially build banned (some places;) inanimate objects at home, but that does not stop legislators from making those that do criminals. You didnt update FaceRegistry? That's a felony, and another felony for modding your 3d faceprinter to break the FR DRM.

I'm sure that will sit well with Londons large orthodox muslim community.

As someone in the field, I recommend sunglasses and those filter masks common in Asia.

This might do:

https://upload.wikimedia.org/wikipedia/en/c/c0/V_for_vendett...

Or paper bags.

How about the old classic -- a Groucho Marx moustache and a pair of glasses? ;)

Or maybe a Theresa May paper mask...