In reply to icnoble:
Entirely depends what he is downloading. If its something out of copyright, or never copyrighted, or specifically freely distributed, and there's shedloads of all of the above, then no.
Even if the music is copyrighted, then its a real legal minefield. The one thing for certain is that **uploading** is illegal (and if you are downloading a torrent file then you are generally simultaneously uploading). Whether downloading for private use is illegal depends on where you live. In Canada, IIRC, its legal.
One thing it certainly isn't is theft, despite what the music industry say. Theft generally requires you to remove something from someone else's posession.
That's my understanding anyway.