Even if it was a difficult operation to copy a song, it only takes one person to do it. After that the spread of the song via the Internet or other means of propagation is only limited by the honesty of the users.
“Having worked for him in the nuclear weapons policy business, I can tell you that President Reagan was committed to assuring the effectiveness of our nuclear deterrent.”
“And the fact that you must make the movie for yourself because no one else will ever fully appreciate the endeavor, makes it a more rewarding challenge.”