One: On the family iPad we had at the time, we hadn't ever uploaded music to it from the family library, because there wasn't enough space for it all. Whenever anyone opened control panel and accidentally pressed "play", something by U2 (with a not-appropriate-for-little-children album cover) would come on.
Two: It was hard to remove that darn album. I couldn't figure out how to get it to go away for the life of me.
There's also a fundamental difference between someone adding something like Clippy to your desktop (or a U2 album) and someone saying "you need to fix your stuff or you get kicked out."