Hi longroad,
This is pretty widespread now. Unfortunately, LW can't control what people share - even if it's junk. Here's some info on corrupt audio & bitrate to file size ratio:
http://www.gnutellaforums.com/showth...164#post104164
Also some about virus probs on the network:
http://www.gnutellaforums.com/showth...threadid=41432
*The latest releases seem to be far likelier to be crap than older/rarer stuff.