Linus Torvalds: Patents are nasty. It's kind of hard to really say a lot more than the fact that patents on ideas in general are a huge mistake and the whole notion that you can have patents, business models and software is pretty broken to begin with.
I found this very interesting, especially the beginning about software patents, where he compares the situation with cold war (big companies) and terrorists (patent trolls), and later what he concedes about innovation and open source.