Vending machines installed in a university in Canada have cameras, but various companies assert that they don't identify persons or store photos of them. They only detect that some person is in front of the machine and perhaps wants to use it.

In my view, the injustice of most cameras that watch people lies in tracking people. A camera that can't identify a person (or a car) is not an injustice. But it makes sense to demand that the company demonstrate at the technical level that these cameras cannot identify persons.

We can't take on trust any statements about what the machine actually does today if that depends on software, because the machine's owner could install different software any day.