These hearings are nothing more than democracy theater, and I'm a bit surprised that otherwise smart people, namely most of those posting on HN, actually believe differently. The government has already shown, many times, its willingness and ability to shut down sites, unilaterally, by simply telling ICANN to redirect where a domain points. SOPA is merely a formalization of that power. I surmise that the best way to let a congressman know that you are serious about this issue is to put a bullet in the head of the congressman sitting next to him. If you aren't willing to go that far to protect your freedom, then you are just as full of hot air as the OWS crowd. I don't expect upvotes on this comment, but I am certain that all of the downvotes will come from cowards, the uniformed, idealists, or agents of the government. DNS is broken, and needs either extreme violence to protect its existing fragility, or an awesome technical improvement that will pry the government's grubby fingers off of it for good. Take your pick as to the best route, but wishing for logic and common sense at these hearings is pointless.
EDIT: I should point out the following, for those who think that there really is no need to worry. "Risk of Jail for Ordinary Users: It becomes a felony with a potential 5 year sentence to stream a copyrighted work that would cost more than $2,500 to license, even if you are a totally noncommercial user, e.g. singing a pop song on Facebook." - http://americancensorship.org A felony is a felony is a felony. Once you are guilty of one, your life changes significantly. It all comes down to which law you are willing to break. Just a couple of decades ago, murder and treason were pretty much the only serious crimes. Now, manipulate certain bits in a particular way, and it's treated as almost the same thing. Think about how much we've already lost through our passivity, and how much more we have to lose.