Senator Orrin Hatch (R-UT) has proposed the INDUCE act of 2004 (originally the Inducement Devolves into Unlawful Child Exploitation Act of 2004, but retitled Inducing Infringement of Copyrights Act of 2004). The act would potentially outlaw anything that anybody could do that would conceivably be considered by any reasonable person to encourage or induce the infringement of copyright. If you want to read a good annotated review of the act, look at the Obsessively Annotated Introduction to the Induce Act.

Lawrence Lessig has an article about this entitled "even I can't believe this" on his blog.