[_iyig]

>Our privacy is eroding. [...] The war is not lost, however.

Steven Rambam would probably disagree. He's a private investigator who's given many excellent talks on privacy at Hackers On Planet Earth (HOPE):

https://www.youtube.com/watch?v=FHwl6AyL6js&t=10m20s

He goes into exquisite detail on the ways in which private info is shared, sold, amalgamated, and analyzed by private and public entities, and how law enforcement uses (and abuses) these resources. That particular talk is from 2016, so things are probably even worse now.