It is easy to fend off burglars and thieves when you have security system installed in your home. So yes, the short answer to the title’s question is that studies have shown homes with security systems are less likely to get targeted than those who do not.
According to three different studies by two universities and the National Institute of Justice, burglars and thieves are less likely to target homes with visible security systems symbolized by cameras, lighting and stickers or signs. Each study was conducted in different places and time, but the results are similar.
The study of the University of North Carolina in Charlotte asked 400 burglars about their motives and methods. About 80 percent said they would first try to determine if a security system is in place before targeting a specific home. About 60 percent said they would move on to another target if the original one has security system.