Spyware/Viruses...
 

What keeps viruses/spyware from being disguised as video/music and being sent to users of limewire?

If you're thinking in terms of wmv or wma or even possibly rm files then see: http://www.gnutellaforums.com/showth...threadid=31862

As for others it's highly unlikely at present. However, the hidden extension concept is a possibility. Which is why everybody should be armed with a battery of tools like: http://www.gnutellaforums.com/showth...threadid=34464