> People actually _are_ sued on a regular basis
Are they? I'm quite happy to be enlightened, but I've never heard of a patent-based attack against users of widely used open-source tools (the example here is Hadoop). Except for the SCO debacle.
For the younger among us, SCO (with Microsoft funding) did try suing all sorts of people over what they considered their ownership of Unix. They got their badly flayed ass handed to them in every case, because IBM spent multi-millions on a legal dream team that totally discredited their arguments (thanks IBM!).
I know Microsoft have had a welcome change of leadership and are starting to engage in open-source, but this program suggests they haven't given up on their old tricks. Instead of indemnifying only their own customers, they should join with IBM, Google, and Facebook and use their patents and legal clout to defeat ALL patent attacks on open-source software. Then I'd start believing the leopard had changed it's spots.