Why it’s so hard to get away from FB et al.
(…) consider how thoroughly the systems mentioned are embedded in our hypothetical ordinary person’s everyday life, far more invasively than mere logs of her daily comings and goings. Someone observing her could assemble in forensic detail her social and familial connections, her struggles and interests, and her beliefs and commitments.
Relevant: Obfuscation. A User's Guide for Privacy and Protest.