If that guy Future goes around shooting his mouth off, whether in music lyrics or whatever, and someone decides to take his words to heart and goes out and commits an act, you damn right that he could be held accountable, although admittedly, it might be difficult to prove.
Agreed. Remember the Ozzy Osbourne & Judas Priest cases?
http://ultimateclassicrock.com/ozzy-osbourne-fan-suicide/
http://ultimateclassicrock.com/judas-priest-suicide/