DRM free downloads are all very well but if you were thinking that meant you’d be able to share the music around you’re mistaken.
Apple and EMI have ensured that should the music you buy from the iTunes store end up on an illegal file sharing site – whether you put it there, or someone else – the file will include information about you. Your name and email address specifically.
So don’t think that DRM free music means you can start pirating music. If you do they will know about it.
Given this fact, it seems rather odd that DRM was ever necessary.