Police do not prevent crime -- they are there to pick up the pieces and take notes. They are historians. Any system that will help them in their note taking and crime solution is welcomed by them. You'll still get mugged, but now they have it on tape.It is amazing how many people are deluded into thinking that the police are there to somehow stop a crime before it happens. They have a rude awakening when they call 911 and ask for help to prevent a crime that is about to happen, and get told, "Sorry, we can't send an officer. If something actually happens, call back."