That's a good point. CCTV may act as a deterrent. It make me wonder if crime moves somewhere without CCTV (in which case we'd need a 100% coverage to win, not

That's a good point. CCTV may act as a deterrent. It make me wonder if crime moves somewhere without CCTV (in which case we'd need a 100% coverage to win, not a good proposition). Or, perhaps, it's not a zero-sum game. If many criminals are not "professionals", then CCTV could dramatically reduce crimes of opportunity if it does act as deterrent. To analyze it right, I'd want to see if petty theft and other crimes of opportunity were reduced, rather than crimes like street brawling. Lumping all crime together when some are unlikely to be influenced by the cameras (because they are motivated by emotion rather than profit, for example).