https://www.cnet.com/news/ice-reportedly-uses-facebook-data-to-track-undocumented-immigrants/

When US Immigrations and Customs Enforcement tries to track down immigrants, one of the tools the agency can use is backend data from Facebook, according to a report Monday by The Intercept.

For example, while looking for a man in New Mexico last year, ICE was able to get a log of when he accessed Facebook, as well as corresponding IP addresses for each of those logins, according to documents obtained by The Intercept through a public records request.