Yea this data purchasing is a pretty extensive problem, used at all levels. I like EFF and think they do good work. Hopefully they, and other organizations, can help figure this out.

[0] https://arstechnica.com/tech-policy/2020/08/secret-service-o...

[1]https://arstechnica.com/tech-policy/2021/01/military-intelli...

[2] https://arstechnica.com/tech-policy/2020/12/how-your-digital...

[3] https://arstechnica.com/tech-policy/2020/07/cbp-does-end-run...

[4]https://arstechnica.com/tech-policy/2021/03/one-company-want...

[5] https://www.brennancenter.org/our-work/analysis-opinion/fede...

[6] https://www.vox.com/recode/22565926/police-law-enforcement-d...

[7] https://www.businessinsider.com/police-buying-hacked-data-by...

[8] https://futurism.com/the-byte/cops-buying-social-media-locat...