I suggest you read up on the history of free software and open source. It exists as a reaction to intellectual enclosure, to prevent that ill and create greater freedom of ideas. Yes, it uses the tools of copyright to fight greater ills of copyright, because those are the tools available, and actions like these are necessary to keep the enclosure from happening all over again. Anyone who has actually studied the matter for even five minutes can see how silly the "free software is anti-freedom" FUD is.