My latest Guardian column, "Why CCTV has failed to deter criminals," looks at the London riots and the way that rioters were willing to commit their crimes in full view of CCTV cameras, and what that says about CCTVs as deterrence. I think that we need to draw a distinction between having cameras on all the time in case someone commits a crime, and using cameras at the time that crimes are being committed -- for example, hooking up a CCTV to a glass-break sensor (possibly configured so the CCTV buffers and discards video continuously, but only saves the few seconds before the breakage).
There's a tiny one-way street on the way to my daughter's daycare that parallels an often crowded main road, and from time to time, local drivers will get the idea of using it as a high-speed shortcut. There are two schools in this street, and a lot of bicycle traffic, and I've lost track of the number of times that I've seen near accidents as impatient drivers roared down the street.
But the local council haven't installed a CCTV camera there full time. Instead, when the problem flares up, they stick one of those creepy CCTV cars at the top of the street and hand out gigantic speeding tickets for a day or two, until everyone gets the message and the street falls quiet again. That is, they locate a camera where there is a problem, use it until the problem is over, and relocate it. They don't watch everyone all the time in case someone does the wrong thing.
After all, that's how we were sold on CCTV – not mere forensics after the fact, but deterrence. And although study after study has concluded that CCTVs don't deter most crime (a famous San Francisco study showed that, at best, street crime shifted a few metres down the pavement when the CCTV went up), we've been told for years that we must all submit to being photographed all the time because it would keep the people around us from beating us, robbing us, burning our buildings and burglarising our homes.
Why CCTV has failed to deter criminals
A year before the Vancouver Winter Olympics, a reporter from a one of the local papers called me to ask whether I thought an aggressive plan to use CCTVs in the Gastown neighbourhood would help pacify the notorious high-crime heroin district. I said that the deterrence theory of CCTV relied on the idea that the deterred were making smart choices about their futures and would avoid crime if the consequences might catch up with them.
Then I recounted my last trip through Gastown, where the pavements were thronged with groaning and unconscious emaciated addicts, filthy and covered in weeping sores, and asked if those people could be reasonably characterised as "making smart choices about their future."
(Image: Riots in Hackney, a Creative Commons Attribution (2.0) image from ssoosay's photostream and CCTV: Church Square, Bedford IMG_3569, a Creative Commons Attribution (2.0) image from fotdmike's photostream)