Privatunes gives you five reasons to anonymize your iTunes library:

1. Am I still a child who needs his pencilcase and schoolbag tagged with my name?
2. I bought the damn tune, but someday I may want to sell it (hey, how is it more stupid that selling old CDs ?).
3. I just have a thing for privacy. Is it dirty?
4. How the heck do I know it's not gonna be shared on P2P networks by my 6 year old step sister???
5. I thought good customer-seller relationship ment something like... how do they say, "trust' ?