see Amazon's Sidewalk™ (e.g. essentially every Siri, echo, and internet doorbell) A few larger retails participate in beacon tracking patrons (i.e. tracking th

see Amazon's Sidewalk™ (e.g. essentially every Siri, echo, and internet doorbell) A few larger retails participate in beacon tracking patrons (i.e. tracking their mobile devices' bluetooth/WiFi pings). This requires no active participation/agreement from the users/devices — if you have those services' antennae `ON`, they are constantly `announcing`. There is even a massive network of crypto currency nodes, which uses geoscarcity to award tokens by relaying LoRa traffic (e.g. Helium [0]). A popular current use of this is for inventory tracking in-transit as well as stolen tool monitoring (e.g. Bosch). It's not far-fetched that these technologies will continue their un-opt-out-able expansion (e.g. all the roadway vehicle scanners, which track you even if you don't have a license plate visible and don't carry a cell phone). [0] https://world.helium.com/en/network/iot https://world.helium.com/en/network/iot