What Privacy?
Before I read the book Daemon, I really didn't think about my phone and privacy all that much:
At any given moment, it - and therefore your carrier - knows within a few feet exactly where you're standing. It knows when you're stationary or walking - and the direction you're heading. It knows who you stood next to on the transit bus, that you walked through Washington Square today when a political rally took place.
Mind you, Daemon is fiction - but many things could be done with the reams of location/activity data the typical smartphone has access to, and not all of them are good...
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