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The large, bearded man bounded to the front of the room last Friday, hand thrust into the air, fingers shaking. It was a question-and-answer session, but he clearly wouldn't be able to wait long. He began speaking just before a conference organizer moved to hand him the microphone. "So many stupid insults—and mistakes!" shouted Richard Stallman, the father of the free software movement. "I proposed a way to solve the problem! It's elegant, and it gets right to the point. Your criticisms are completely wrong." The speaker he was denouncing, Professor John Duffy of the University of Virginia, had been defending software patents to the assembled crowd a moment ago. Duffy was actually proposing reforms, but as was the case with most speakers at this legal conference, Duffy's...