There are many people up in arms over Microsoft's DRM strategy. Having followed "BambisMusings" for some time, I have read her postings on this topic. (See "DRM, DMCA, Copy Protection".
Further to that has the McKenzie report. (No, not "the" McKenzie) published by ComputerWorld in "Vista and More: Piecing Together Microsoft's DRM Puzzle".
Roughly translated, DRM is related to copyright protection -- something that gets people as hot under the collar as does discussions of patents. I'm sure this will raise further discussions after Vista is finally on the market.