Groklaw has been covering the SCO vs. IBM lawsuit. In the latest rejoinder SCO claims that "The GPL violates the U.S. Constitution, together with copyright, antitrust and export control laws, and IBM's claims based thereon, or related thereto, are barred."
If I'm not mistaken SCO has been distributing Linux for some time now. I guess they are knowingly and willingly a participant in violating the Constitution, export control and antitrust laws. How much more culpable is a company who knowingly violates the laws.