The Inquirer : “Giant photocopying firm Xerox has admitted designing its color photocopiers so that they put a hidden code on your copy that will help the US government identify you According to Peter Crean, a senior research fellow at Xerox, all his company's laser printers, copiers and multifunction workstations, put the serial number of each machine in yellow dots on the page. He told the Medill News Service that the dots only show up if you look at the document with a magnifying glass while...