This is all about restricting the First Amendment. After all, censorship is becoming America's favorite past-time. The US gov't (and their corporate friends), already detain protesters, ban books like "America Deceived" from Amazon and Wikipedia, shut down Imus and fire 21-year tenured, BYU physics professor Steven Jones because he proved explosives, thermite in particular, took down the WTC buildings. Free Speech forever (even for filming).
Last link (before Google Books caves to pressure and drops the title):
www.iuniverse.com/bookstore/book_detail.asp