Their is an excellent book called "Into the Whirlwind" about Stalin and the soviet era purges. One of the strategies of those arrested was to name 2 more. While a great concept in theory, it just made the purges worse.

https://www.amazon.com/Journey-into-Whirlwind-Eugenia-Ginzbu...

I always come back to structural regulation works best. At the end of the day, we just need to make it very costly to keep too much information. We set rates for personally identiftying attributes (e.g storing a birthdate costs x, a partial ssn Y, etc). The charge is per attribute per person per day. This should incentivize the tech companies to develop and store broad scores (e.g scores high for likes sports and classic rock, low for opera) rather than personally identifying info

> Embedded journalists, activists, people with sensitive medical information.

And? At risk populations are always minorities.

Journey Into the Whirlwind by Eugenia Ginzburg is a book you'd probably enjoy.

https://www.amazon.com/Journey-into-Whirlwind-Eugenia-Ginzbu...