Great use of tech and knowledge. Video-recording glasses wearers can’t complain about this because they are sending the Bluetooth signals to be detected.

We need to scale this idea up - apps to detect the known types of signals emitting from camera systems like Flock, Ring, and other similar mass surveillance garbage.

There are a few BLE Radar/Scanner Apps Like this. f-droid.org/packages/f.cking.software

You just need to know the Mac address range of the manufacturer and can get notified if body cams, smart glasses or anything else using Bluetooth is in the vicinity

BLE Radar | F-Droid - Free and Open Source Android App Repository

A tool to monitor, analyze and find BLE devices around you.