That's because 99% of the cameras are only there to reduce insurance premiums
And so are switched off a lot of the time, suddenly get switched on when the insurance assessor pops round for a visit at renewals time, and even then the feed goes to an E-180 VHS casette so old it's still got the Aardman-designed, Derek-Guyler-voiced plasticine skeleton on the cardboard sleeve, that constantly gets re-used so is only ever of use in solving crimes if those crimes took place and are detected within three hours of an insurance renewal assessment visit.

Big Brother may well be watching you, but he's got the memory of a goldfish.
( shinyshinyscalp less a man, more a way of life, Wed 7 Dec 2011, 14:00, Reply)