I think just as Tor, BitTorrent, and Silk Road scoff at laws and exist outside/despite them, Bitcoin will exist in the same way. It's getting to the point where the government is passing laws or threatening lawsuits to try to stop something they can't control (SOPA is a great recent example), and the people are just completely ignoring them, since they will have little effect in the end (not counting the anti-SOPA protests, though if it had passed, switching to I2P or Namecoin would've meant the government would have lost even more control).