Oh you mean privately owned cctv that faces public place. Yeah, I agree it is questionable since public spaces are the jurisdiction of law enforcement. But I can also see it as someone with a hobby of hoarding data, archivists, and the other extreme being as you said, voyeur. But there is no way of knowing hence I also understand your irks towards it.
I prefer CUID
Just to clarify: Yes, I do know not all use cases are appropriate for CUID. But in general when generating ID, I’d use CUID2