Open Source One

IBM has made lots of friends in the open source community by pledging a fraction of its patent portfolio to the defense of open source projects, and by pouring billions of dollars into development of open source and marketing Linux and other open source solutions. Does that give IBM a free pass to attack an open source project, or are FOSS advocates justified in turning on Big Blue for one action against a history of open source support? IBM is one of a a handful of companies that have committed patents to the Open Invention Network (OIN) and promised not to go after open source projects that may be infringing on those patents.