Last week, Microsoft (MSFT) initiated what can only be described as a rather bizarre public-relations campaign in which they alleged that Linux and Open Office may violate hundreds of the software maker's patents. While some of the mainstream press reported Microsoft's statements as news, many journalists and bloggers keenly identified the most intriguing aspect of this aggressive maneuver: a glimpse of a threatened giant struggling to keep a grasp on its empire. What most people don't realize is that the story really isn't about patents at all—it's about a rational actor trying to protect its privileged position.