I'm currently going through my MP3 list and attempting to single out all the ones I once downloaded from the original free Napster. I'm methodically deleting them. I can't live with the idea of having illegal downloads--it kind of gnaws at the conscience, pestering me to get rid of them, which I intend to do.
I guess the reason I'm doing so is because it doesn't take much waffling in any area to find yourself on a slippery slope, and I'm climbing off that slope, one measly step at a time. Give it a try. You'll be happy you did.