> potential for being more insidious and more passive. Im thinking of sound beacons I have some bad news for you - what you describe as a dystopian future hell

> potential for being more insidious and more passive. Im thinking of sound beacons I have some bad news for you - what you describe as a dystopian future hellscape was up and running by 2015. If you want to so much as slow it down, stick to F-Droid or ditch your smartphone. [0] https://www.wired.com/2016/11/block-ultrasonic-signals-didnt-know-tracking/ https://www.wired.com/2016/11/block-ultrasonic-signals-didnt... [1] https://arstechnica.com/tech-policy/2015/11/beware-of-ads-that-use-inaudible-sound-to-link-your-phone-tv-tablet-and-pc/ https://arstechnica.com/tech-policy/2015/11/beware-of-ads-th... [2] https://arstechnica.com/information-technology/2017/05/theres-a-spike-in-android-apps-that-covertly-listen-for-inaudible-sounds-in-ads/ https://arstechnica.com/information-technology/2017/05/there...