Big trolls vs. small trolls: The real battle behind patent reform
The dirty secret IBM, Microsoft, and other self-proclaimed advocates of patent reform don't want you to know is that they are trolls, too. They have large and highly profitable business units using exactly the same tactics as the patent trolls they hate. The reason they hate the trolls is not because of what they do -- after all, IBM and Microsoft were the pioneers of treating patent portfolios as profit centers rather than cost centers. No, the reason they hate the trolls is because the trolls attack them with the weapons they themselves perfected.
Also from Phipps (OSI President): 4 ways open source protects you against software patents