This is exactly it: a beacon just announces itself and provides its ID. It's up to an app on the receiving device to listen for the beacons it cares about and r

This is exactly it: a beacon just announces itself and provides its ID. It's up to an app on the receiving device to listen for the beacons it cares about and react to them. The beacon has no way of knowing which devices are listening or are in range of the beacon so there's no privacy issues I can think of.