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* no mobile contact tracing - lots of actual. I'm not sure how much the mobile protocols would even help in protests. Don't you need proximity with someone fo

• crushthecurve 6y ago
  If there was a mobile contact tracing app that used AGPS with accuracy down to ~1m maybe it would be useful? Existing contact tracing apps use Bluetooth which can't be used to determine proximity with any reliability - solid objects (particularly human bodies) absorb significant signal. Unless all protestors were holding their phones up high for unimpeded line-of-site connections then even protestors next to each other could 'appear' 20-30m away. In most cases (especially in a protest situation) all Bluetooth-based contact tracing apps can tell you is that two devices are in Bluetooth range (so accuracy of ~30m?).