Recently I learned about this effort by Homeland Security, Border Patrol, and other government agencies to track the online discussions of citizens & immigrants, and tie those discussions to their SSNs.
I suppose LifeLog (Facebook) was merely a stepping stone in this effort, which appears to be accelerating with the advent of low-cost AI.
https://www.vice.com/en/article/m7bge3/dhs-uses-ai-tool-babel-x-babel-street-social-media-citizens-refugees