Richard Stallman is saying what @dredmorbius has been saying for a long time now. Data is dangerous, and should not be collected unless absolutely necessary.

theguardian.com/commentisfree/

@starbreaker @dredmorbius the fella behind the bookmarking site Pinboard has been saying this too. Treat personal data like radioactive waste, not an asset. Don't hoard it, store it safely etc.
He's done a few talks and blogged on idlewords.com