FOIA docs obtained by @Joseph Cox show the Secret Service talking about how they don't need a warrant to track phone locations because people "willingly" gave it away by agreeing to long terms of service docs for random apps

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'FYI. A Warrant Isn’t Needed': Secret Service Says You Agreed To Be Tracked With Location Data

The Secret Service has used a technology called Locate X which uses location data harvested from ordinary apps installed on phones. Because users a...