The threat of surveillance may be enough to scare off a would-be-intruder, even if there's no one actually watching. Any homeowner can place a home security sign in the front yard, whether they pay for the service or not. The key is to choose a fake sign from a legitimate company so that it's not obvious yours is a phony. This version, from BrickHouse Security comes with four vinyl security decals to stick on your door or windows for added peace of mind. Available on Amazon; $15.