We have had close so I count that as yes. About 10 or so years ago there were demos of a pi and webcam driving a smart ad display that monitors anyone walking b

We have had close so I count that as yes. About 10 or so years ago there were demos of a pi and webcam driving a smart ad display that monitors anyone walking by - gives them a unique id, guesses age sex and mood (at least) and if they look at the ad monitors for mood change and duration of attention.