Some more reading for you can be found here
http://www.gnutellaforums.com/showth...highlight=pr0n http://www.gnutellaforums.com/showth...ght=child+porn http://www.gnutellaforums.com/showth...threadid=49030
among many
Just remember that Limewire is part of the open Gnutella Network and is powerless to stop any material from being shared. Users can filter material and report offenders to the authorities however.