Reminds me of Bluejacking back in the day. Take a group picture of a bunch of random strangers in a store, then send it to as many open Bluetooth connections as

Reminds me of Bluejacking back in the day. Take a group picture of a bunch of random strangers in a store, then send it to as many open Bluetooth connections as you can find and watch people scratching their heads trying to figure out who was "watching them". CompUSA was always a good candidate store due to the volume of "techies" in one place.