Explaining SOPA

A lot of people are concerned about SOPA, the Stop Online Piracy Act. There are plenty of pages that say that it will destroy the Internet, but very few that explain clearly exactly why. It has also become clear that the politicians writing the law have no idea how the Internet actually works. So here is my attempt to explain it all. Let me start by explaining DNS, using a situation that doesn’t involve computers, that hopefully anyone can understand.