We've thought about getting CCTV installed due a huge spike in the local area of car thefts, bike thefts, shed break ins, etc etc.... Local community groups are full of posts each night of CCTV / Ring Door Bells etc capturing these night time creatures checking door handles or nicking cars, but the local plod won't even bother turning up never mind investigate the footage. There's been 10+ videos of the same bloke doing cars, and nothing has been done about it.
So we decided not to bother wasting our money on CCTV that'll be of no use other than to allow us to see the crime committed.