Billboards That Watch the Watchers

Billboards That Watch the Watchers in: Hot Issues, Internet, Latest News, business Rick Rivera, left, and Nathan Lichon spot the sneaky little cameras in an electronic billboard in Manhattan In advertising these days, the brass ring goes to those who can measure everything â€" how many people see a particular advertisement, when they see it, who they are. All of that is easy on the Internet, and getting easier in television and print. Billboards are a different story. For the most part, the