This has made me think. Whilst the damage to my wife's car is annoying and feels personal, its not the end of the world. A Corsa bonnet new is about £70, I could spray it myself. Which is cheaper than the excess on her policy. We do live in a quiet area of Didcot (there are some) and its only frequented by walkers and learner drivers. However escape to the open country side is only across the road through other gardens.
If I got an alert at night would I go outside to tackle the criminal...probably not, I'd more likely shout out the window. Id like to think I'm more use to the wife and boys with out a knife stuck in me!
So I guess the question is why get CCTV? I think its the perception that we will feel safer and potentially catch a criminal. Its a deterrent. We can check on the house when we are away. We already have a Foscam inside for such purposes, so it would be an extension of that assurance.