To answer the original poster's question....I can honestly say I never have! Not a record, not a movie, and I don't use MP3's! I buy my music at the music store and play it the way it's suppose to be played. I quit using most tubes some time ago when I saw the disney and precious moments tubes on line. It was clearly a copyright violation. It's pretty easy to tell what's "original" and what's not....you can tell if someone has "clipped". The bottom line: follow the rules and read the "readme files". If you're not sure about something: ask. If you want to use someone's work: ask. If they say no: don't use it! Pretty simple to me.....but then I'm from Minnesota, where everything's a bit simple :)