Groklaw about NTAP vs Sun

Grooklaw summarizes an observation in The NetApp-Sun Patent Litigation Is On: Anyone Know of Any Prior Art?

I also feel that when a company open sources its own code, the immediate response shouldn't be punishment by litigation to try to make it stop. IBM has been through it and now Sun. IBM was guilty of nothing at all, at least from all we've seen in the litigation. Nothing except supporting Open Source and Linux. Now Sun decides to join the Open Source fun, and wham, litigation. I begin to discern a pattern. I guess the proprietary folks have a strategy to use patents as the battering ram.