Open source = communism = innovation obstacle ?

Here we are: Bill Gates blew a fuse. In an interview with CNET, Bill was asked about intellectual property rights, of course in the light of recent developments in open source and music piracy. And here is what Bill said:

(…)There are fewer communists in the world today than there were. There are some new modern-day sort of communists who want to get rid of the incentive for musicians and moviemakers and software makers under various guises. They don’t think that those incentives should exist.