I would remove it and give your son an allowance on iTunes. You can set that up though the iTunes Store.
I do use P2P and Torrent searches to find media that is not available to me for purchase or viewing other wise.
P2P is plagued with fake files that can easily be downloaded in error and cause many problems on your PC. BitTorrent sites are considerable better in this department, but not entirely clean.
Being honest and purchasing media when you can is the cheapest character trait money can buy.