There is a huge difference between locking your door and setting up a CCTV system at your house. Locking doors (in normal residential areas) is mostly a signal

There is a huge difference between locking your door and setting up a CCTV system at your house. Locking doors (in normal residential areas) is mostly a signal of intent. You signal to everyone you don't want them entering your house, unless you've given them permission/key. It also sets things up so that no one can enter your house and then claim they didn't know you didn't want them there. Thirdly, it sets thing up so that people who want to enter your house without a key will have to act in an obviously suspicious way. If someone breaks a window or starts breaking your door with an axe, any neighbour or passer by will know something weird is going on. None of this applies to CCTV systems. >considering that it is easy to surf news sites and find video This is confirmation bias in action. You need statistics on your residential area to make decisions around home security.