How convenient, they have built-in bulls-eyes.
When Surveillance Cameras Talk
http://www.time.com/time/world/article/0,8599,1711972,00.html
(excerpt)
“Big Brother is not only watching you; in Barking and Dagenham, Big Brother wants a word. The disembodied voices of authority offering advice and warnings that now issue as if from thin air in the hardscrabble east London borough are, in fact, talking CCTV cameras — the latest high-tech weapon in the war on littering, graffiti, vandalism and other antisocial behavior. Sixteen of the borough’s 84 surveillance cameras have been wired for sound, making London’s first video monitoring network with a broadcasting capacity. A second borough, Southwark, will soon adopt the same system.”
(Where the U.K. goes America doesn’t trail far behind.)