People steal things from stores which have had cctv for decades. I have no idea why people think these goofy webcams have any effect other than invading the privacy of your neighbors.
The claim is never that it stops all crime. The claim is it stop some crime. That's like saying we don't need doctors because they can't cure everybody all the time.
I, too, am very sensitive about cameras invading the privacy of neighbors. But to be fair, it is perfectly possible that the cameras in question don't view anything outside of the property in question.
> People steal things from stores which have had cctv for decades.
The crime there (shoplifting) doesn't begin until they leave.
In the case of a burglary, the crime begins when they enter.
Seems to be a pretty important distinction when discussing whether knowing a person is physically present on your property alerts you to a crime in progress.
And criminals have been caught using CCTV footage for decades.
I literally just said it solved my problem. Most casual crime is opportunistic, and cameras and lights add uncertainty to the opportunity. Most people aren't willing to chance the camera for an opportunistic score.