Advertisements I assume that they pay to get to the cams. Also, everyone of the investigators is former police/cia/fbi whatever, which means they are all CJIS certified. I think the point is that info is available to law enforcement. I saw a conference and video on tracking people in London and what this show demonstrates is happening. If I lived in London, I would never carry anything electric, I would always wear a hat and large sunglasses. Today its London, in the future every city.