Serves them right if you ask me. They're stealing from someone else when they swap music files. So someone gets their confidential files. It's only "digital information" that should be freely exchanged, as another poster here suggested.
I hate to inform you, but the "stealing" argument wore thin about a year ago. YAWN.
If you want to go there, then I hope you have never made a copy of an album, a VCR tape or posted a picture on this forum without the "owners" permission. If so, by your own definition you're a theif.
Maybe a better question to ask is why have organizations like the RIAA moved to block download for profit as well? Hmmm...
Right now, its moving to a situation where in 10 years artists in studio's will be able to upload entire albums directly to the internet. Some of the basic technology in digital audio is already out there.
In ten years when nearly everyone in America has a cable modem, the PC will probably be the entertainment center. People will be able to download movies as well as music. On some of the higher end web tv's, information on programming and even digitalized recorded playback is automatically downloaded from a server.
Thats where the technology is heading and the bottom line is that this is actually less about copyright protection as it is organizations like the RIAA are seeking to block an emerging market.