But IPs are meaningless, since
a)the Suprnova servers, and pretty much every other server hosting HL2 torrents in located outside of the United States, in places with more liberal filesharing laws.
b)Simply downloading torrent files is not illegal. And in case of legal action, how long does it take me to simply delete the offending files from my computer and over-write and compromised sectors?
c)The people who are downloading are, by definition, those who will not be using Steam to play. This is actually the main reason that Valve's threats are empty. No one is planning on using Steam, and even if they are there is already a Steam emulator in the works.