A referrer header is not an outrageous amount of information. It's the store-equivalent of asking "Where did you learn about us?" Taking it away would hurt smaller sites and do nothing against large companies and ad networks.
The store is asking, the site is not. And 99% of people are trained to click "Accept" after years of dark pattern abuse and they have very little understanding of what happens in the background. I hope you understand that my point isn't to bash a webmaster but rather bring in discussion the principle of the whole thing. Seems that everybody draws the line for what is acceptable in such a way that it perfectly covers their own needs.
I've seen people that insist that using facial recognition is not different from what humans are doing naturally, now done also with electronics. We can agree the implications are different.
