Apple already has shipped something similar. https://httptoolkit.com/blog/apple-private-access-tokens-att...
"hihi, my browser clicks ads in the background, I'm fighting Big Tech so hard rn"
Google implements WEI on chrome and normal users who just want to block ads can't use their extensions anymore.
"Google Bad! I want to block my ads and cause you financial loss too"
"NO" - Google
So, mission accomplished?
Bluntly, it doesn't matter what you or I think -- what matters is what politicians, police, prosecutors and judges think.
I don't see anything on the main github page that says the extension is intended to cause harm to the advertisers or the website, but IME governments have often not cared.
And when 1M people in a country install the extension, are they acting independently or as a group? One person protesting may be legal, 1M organizing may not be protected.