It's 2007 folks, so there's no need to whip out a WiFi detector or boot your laptop just to figure out if there's a WiFi signal in range. These days, you can just look down at your shirt. The new WiFi ...

Take, for instance, a smart doorbell that locks you out of the house because it scanned a picture of Batman that was on your t-shirt instead of your actual face and decided you were a stranger. My ...