I know more recent cameras are using AI analysis to constantly track and catalog people which is more worrying but the old school surveillance cameras don't bother me as much.
I like the OP's idea for an art project more because it's showing your what is really happening (rather than convincing people that filming someone on a 4k camera is the same as CCTV surveillance) - CCTV cameras are constantly monitoring and many can be publicly accessed.
-Me