I use mini discs. I record rap music on them, and use code numbers to identify the discs. That works perfectly for me, since Brother Hounder can only see the code on the disc and not play it.
Teenagers with parents that might throw away albums would do well to have those iPods. There is one problem: You need the song on your computer first. If the parents go through the playlist on the computer and find dirty songs, they are more likely to question what is on the iPod. A guilt trip will result, and most of the music is likely to get purged. The only way around that is to have the teen have their own computer with a password to prevent them from seeing what is on the computer.
Of course, if the parent does erase a song, it is easy enough to just download another copy. If you are using LimeWire or another P2P, beware that, if you are downloading current music, you are usurping their livelihood. If you are using a program like Napster or Rhapsody, or iTunes, you will have to pay for the download. Napster and Rhapsody will allow you to download a song for free, and pay for it when you burn a CD. To go subscriptions allow you to put a song on a device, and still have it as a subscription song (meaning you do not have to buy the song until you want to burn a CD). Either way, it is much harder to censor than records or tapes. Or CDs.