> Not everyone is on their phone, or a laptop.

Nor does everyone leave front-facing cameras (or any device camera) uncovered.

On a site of tech enthusiasts I'd expect an intelligence level of understanding the difference between an embedded ADAS camera and a surveillance system. So how about you check you assumptions first? :)

Any system used to surveil is a surveillance system, QED.

There's no minimum fidelity required, you could use potentially any sensor to surveil. It's a question of use.