" People don't understand computers. Computers are magical boxes in things. People believe what computers tell them. People just want to get their jobs done. people don't understand risks. They may, in a general sense, when the risk is immediate. People lock their doors and latch their windows. They check to make sure no one is following them when they down a darkened alley. People don't understand subtle threats, don't think that a package could be a bomb, or that the nice convenience store clerk might be selling credit card numbers to the mob on the side. And why should they? It almost never happens. "

― Bruce Schneier , Secrets and Lies: Digital Security in a Networked World