per their legal page:
"You will find both copyrighted and non-copyrighted material on the P2P, file-sharing networks featured on this Site. File sharing is not illegal as long as you obey and comply with all relevant copyright laws. Sharing copyrighted material without permission to do so is illegal.
P2P technology makes it possible to efficiently share all types of files and information. For files protected by copyrights, you need the copyright owner's permission before it can be shared or downloaded by other P2P users. While there is volumes of non-copyrighted material that can be and is being shared on these networks most Popular music, movies, games and software are most often protected by copyright.
Copyright law protects original works of authorship, including literary, dramatic, musical, artistic, and certain other intellectual compositions.
Individuals who reproduce, distribute copies, publicly perform or display works without the copyright owner's consent, may be in violation of the law. Copyright infringement can result in significant monetary damages, fines and even criminal penalties.
For more information about U.S. copyright law, please visit:
http://www.loc.gov/copyright/ "