Yes, home security signs will deter intrusions in Los Angeles
Numerous studies confirm that security signs are a good idea when considering how to deter an intrusion. The reasoning is that the prowler will discover the sign and instantly determine that your residence isn't worth the hassle. Ultimately, why stress over security cameras and motion detectors when they can hit an unprotected house in another neighborhood?
With that being said, the same research indicates that a security sign ranks fairly low as a intrusion impediment. A smartly positioned sign mostly puts off amateur thieves, but seasoned criminals will want to see the level of security that is truly defending your house before moving on. Other equipment, like cameras, have greater success at thwarting prospective invaders.