Slashdot does give you a good laugh sometimes. There’s an interesting story there about music copyright infringement back at the turn of the 19th/20th centuries. The story mentions that the publishers fought the infringement – which was basically unauthorized copies of sheet music being sent by mail – by asking the Post Office not to send the unauthorized copies.
Some wag gave the story the ‘deeppacketinspection’ tag. I like that 🙂