How do they (legally) deal with everyone having smartphones in their pockets? Technically and practically, you have a camera to film the public space in your po

How do they (legally) deal with everyone having smartphones in their pockets? Technically and practically, you have a camera to film the public space in your pocket. Even worse, you have a camera that actually have front side and back side, and you can film with back side and always use plausible deniability and say you were on a video call using your smart camera and not filming around.