How legal is file sharing from Lime Wire in the U.S.A..
 

I subscribed to LIME WIRE a couple of days ago. However, I am somewhat conserned about the legality of file sharing. I undersand that file sharing without copyrights is illegal. Would this be case with LIME WIRE. If there is any questions legal issues, how do I contact LIME WIRE. Do they privide a phone contact. If so does anyone have a phone number.