Limewire is p2p software, what it does is it links you to millions of other computers with p2p software all over the world...Now you can download what people choose to share, be it a new and upcomming band that wants to get their music out there or pictures from around the world, they would be classified as non copyright material...But there are people who share copyright material such as movies and music and programs, the list goes on..
What you choose to download is up to you, so the choice is yours and the responsibility is as well....Limewire is not responsible for the decisions you make or what you choose to share or download, it just provides you with a program....
I hope this helps....