Yes, home security signs can deter intrusions in St. George
Various studies indicate that security signs are effective when attempting to deter an intrusion. The idea is that the prowler will see the sign and swiftly decide that your residence isn't worth the hassle. When it comes down to it, why worry about security cameras and alarms when they can pivot to a less protected house down the road?
With that being said, the same research indicates that a visible display ranks fairly low as a deterrent to crime. A wisely situated sign primarily dissuades novices, but seasoned crooks may want to see the level of security that is truly shielding your home before moving on. Other equipment, like cameras, do a much better job thwarting prospective invaders.