A great introduction to the legal arguments that defeat copyright law on the products of the entertainment industry. The power of Congress to enact copyright law exists only because of a provision in the Constitution that limits the protection to (authors & inventors)of (useful)products for a very (limited time). They had visual arts, music, theater, poetry, and novels back in 1787. If the founders thought their authors merited copyright they wouldn't have added the modifier "useful" to the Constitutional provision.

Maybe somebody wants to write a useful song on the subject?