Earlier quoted context omitted.
How did the camera identify the demographics? BTW this isn't using cameras, it's using location tracking from the mobile phone companies.
Not the parent poster, but I also worked in the tech space of outdoor advertising. The camera based systems I saw used facial detection. The vendors were very keen to refer to "detection" not "recognition" since they (supposedly) only looked at faces and analysed them for demographic information, they didn't track you as an individual. (I'm sure they would have eventually - there's too much money at stake to not trac…
I'm wondering what's stopping people from just covering up the camera with tape or something.
Edit: Never mind. I found one: http://static01.nyt.com/images/2008/05/31/business/31billboa...