What is right, what is wrong, how can anyone say? I view very, very, few things as Right with a capital R.
Even if the music industry simply gave away all their music people would complain that they don't have the bandwidth to download all the stuff - the problem would merely shift from availability to distribution.
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.
Breaking into a system or exposing its weaknesses is a good thing because truth and knowledge must win out.