Over the weekend, Slashdot pointed to various reports suggesting that the new DRM used on certain Sony DVDs means those DVDs no longer play on certain DVD players. If true (and there appears to be many people who have experienced the problem) it would suggest that Sony still hasn't quite figured out from previous experience that DRM is a huge market killer for them. It is taking away value from their products while doing absolutely nothing to add value to their product. This should be obvious to just about anyone -- but it appears that it still hasn't permeated the brains of entertainment industry execs. It would be nice if a Sony exec (from any branch of the company) could explain how DRM benefits customers, rather than pisses them off.