Say you want to keep your house safe. Like, really safe. You buy the most advanced security system money can buy, put up a bunch of lights on the exterior of your home, and even get a guard dog. You install video surveillance with hard drive recording and remote access, and you fervently support your local neighborhood watch program. Imagine, then, that you install all this equipment, and then you leave to go somewhere, double-locking all your doors and windows, and even doing a walk-around to check for potential threats.