4. If you get into legal trouble, you can use it as a stop-gap to prove that you bought the music legally while you dig out the receipts.
The launch of music tracks free of digital locks on iTunes has been overshadowed by the discovery that they contain data about who bought them.
Some fear this data could be used to identify the owner of the tracks, if they turn up on file-sharing sites.
oh so apple isn't giving out free piracy licenses to users who buy unprotected itunes music, common people were you expecting to be-able to buy it and share the song with 1000's of your "friends" without apple being able to trace you.
I can't imagine anybody who's paying $1.30 per song and then putting their music on a p2p. If you're the kind of person who pays for music, you're probably not the kind of person who trades music illegally.