Copyrights laws are very confusing and they can be interpret in many different ways. Unfortunately sometimes we can really get in trouble by misinterpret them. Check out this Funny Joke about copyrights.
The letter reads:
The purpose of this letter is to inform you about a recent open lawsuit against you for the violation of the copyright laws.
The reason: You had a song playing in your head all day on November 07 2009 and you do not own a copy of the artist album. To avoid a second offence and a more severe action, erase all songs from your brain that you do not own immediately!