Where are the Eyes is a program for detecting and mapping surveillance cameras. Users mark cameras on their phone as they walk past them, and build a shared global map of surveillance.
Our hope is that Where are the Eyes will be widely adopted and used to help activists in two ways: to increase awareness of surveillance and authoritarian practices, and to plan activist movements.
https://eyes.daylightingsociety.org/
and also:
https://www.wikihow.com/Blind-a-Surveillance-Camera