If you're not familiar with WonderHowTo.com, it's a site worth checking out. Its tagline is "fresh hacks for a changing world" and a notable "how to" post from a few years ago is titled "Use Social Engineering to Gain Unauthorized Access to a Hotel Room." And while it contains a caveat indicating that the information within should be used only "on your own hotel room" it's clear how others could put the information to use