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.
Where do you think all of the music on p2p networks comes from, then?
Some evil interweb pirate plunders a music shop at night, rips his loot on his pirate ship, shares it with his evil pirate friends and ends the day with a bottle of rum?
Most of the music on the p2p is ripped from legally bought CDs. Some people just don't mind sharing their legally bought music.
I'm not too concerned about the whole thing. As long as they make sure that the people who are going to get their accounts banned (and maybe a lawsuit) thanks to this are 100% quilty. We don't need another RIAA-style "quilty until proven innocent" lawsuit-frenzy.