There are over 1 billion active surveillance cameras globally. A conservative estimate suggests that 1-2% have default or weak credentials. That is 10 to 20 million cameras vulnerable at any given moment.
Several features make Telegram perfect (and problematic) for distributing sensitive IP camera data: ipcam telegram channel exclusive
These Telegram channels claim to provide "exclusive" access to live camera feeds from around the world. There are over 1 billion active surveillance cameras