So HN downvoters prefer the current centralized model of Internet name services which are vulnerable to a denial of service attack from technologically illiterate politicians?
They're downvoting you because you're not only missing the point of the article with your first comment, but because allowing this to happen would make DNS even less likely to be replaced any time soon. Once the government is involved in attempting to control the flow of traffic to different websites, any backbone essential to their method of control will stagnate and remain in place almost indefinitely. These people still use IE6 out of misplaced fears for security and a general laziness when it comes to updating, remember?
DNS is not the only place where an ISP can block a website. They could block the IP, or sniff your unencrypted requests. Look at China, they even do keyword filtering! I can see this "feature" being marketed as parental control or whatnot...