As far as I know nobody has ever been arrested. Copyright infringement is a civil matter, not
a criminal one. Nobody has even been sued for merely downloading either. Even for uploading,
the odds of getting struck by lightning are far higher.

If you don't share the latest movies or music, and stay away from software and porn, you're
practically bulletproof.

Choice of software has little bearing other than that gnutella doesn't force you to share while
downloading, so any gnutella servent with partial file sharing turned off is a bit safer than
using any bittorrent or edonkey software.