It's late and I really should sleep, so I'm just going to quote from my literature review notes something you might find interesting...
Nacro02 - To CCTV or not to CCTV? A review of current research into the effectiveness of CCTV systems in reducing crime
===
NACRO, Armitage, R. (2002).
- Effectiveness of CCTV dependant upon context of it's application
- Warns against over-investment in CCTV, when better street lighting may be a better measure
- CCTV in car parks effective, CCTV in town centres have little impact upon serious or violent crime
- Evidence shows, without constant publicity, CCTV schemes loose effectiveness
- Biggest fall in crime associated with BEFORE the cameras become operational (because of the increased publicity)