OK... woa, wait a minute: to the stealing scenario, where someone steals your music.

(1), It doesn't matter if the thief finds out your name and/or email address. What could they do to it? Your name could be any other name from the 3 billion people in the world, and the worse they could do with your email address is spam you.

(2) They could post it on LimeWire, etc. Sure, so what? Not only is it unlikely that the RIAA (or whatever the organization's name is) comes knocking on your door (again, how would they get your address from only your name and email), but if they do, your innocent. They can search your computer for a copy of the song, they could search your computer for a copy of LimeWire, they could see your web history, they won't find anything. Innoccent until proven guilty.