What about this: Noticing and remembering people's faces, clothes, tics, etc. when they walk up to you. Also you have blanketed the planet in cameras that all feed back to a giant database that builds a detailed dossier on almost everyone, based on faces, clothes, tics, etc.
The way you put it sounds almost accidental, like no effort was made, with no real goal in mind. That's not a faithful analogy of the pervasiveness of Google Analytics, Facebook buttons, etc.
It is when you place yourself in a position to be nearly every one of the hundreds of people that person interacts with in a day.
Quantity has a quality all of its own. You can't property reason about tracking and surveillance through analogies to conventional social interaction.
https://en.wikipedia.org/wiki/Cyberstalking
I don’t think you will be able to convince a court that browser fingerprinting is cyberstalking though, but you could certainly try.
The cyberstalking industry has many players. Most are small. A target-rich environment.
Shifting the investment or financing calculus, via increased investor risk, possibly including legal liability, would be huge.
Ultimately, I think it should require user consent. (And, speaking of consent, I wonder if simple fingerprinting and associating a browser with an ID would violate the GDPR. It's clearly intended to be "personal" to one particular user, but is it "identifiable" information? Does it matter?)
Stalking is unwanted and/or repeated surveillance by an individual or group towards another person.[1] Stalking behaviors are interrelated to harassment and intimidation and may include following the victim in person or monitoring them. The term stalking is used with some differing definitions in psychiatry and psychology, as well as in some legal jurisdictions as a term for a criminal offense.
This should also apply in the digital world. Doesn't it?