Yes, home security signs can deter intrusions in Boston
Various studies indicate that security signs work when attempting to deter an intrusion. The reasoning is that the thief will notice the sign and instantly determine that your property is way too risky. When it comes down to it, why get concerned about security cameras and motion detectors when a burglar can hit a more vulnerable home somewhere else?
However, the same studies note that signage ranks fairly low as a intrusion impediment. A smartly positioned sign mainly discourages amateur thieves, but professional crooks will want to see how much security is really defending your home before moving on. Other equipment, like outdoor video cameras, have greater success at thwarting prospective invaders.