We aren't against all IP on principle, but we think the current arrangements, especially in the US, are flawed and risk actually stifling innovation rather than fostering it. See some remarks (and other messages in the same thread) made in the context of a discussion about whether we should be working for the UN IP advisory group!
Opinion on this issue tends to be rather polarised. If our position strikes you as necessarily anti-capitalist and cranky, we invite you to take a look at The Economist of April 8th 2000 (available on-line if you are a subscriber, or see a quote from that issue's first leader).