This is why I use Tor. If I ever imagine my comment being read in a courtroom and 12 random people not all loving it, I turn on Tor, use a nickname other than "jrockway", and post it that way.

Yes, the government has shown up at my door because of forum comments from my IP address. I learned the hard way.

(Oh, and you know how Slashdot's FAQ says they don't log your IP? That is a lie.)