It's sorta like saving electricity. We're mostly pretty inefficient so it's easy to make instant savings. For example switching from incandescent light bulbs, putting in geyser blankets, and so on, are all implemented easily, cheaply, and have an instant material effect. But it's a one time saving. It delays the inevitable, it bys time, but it doesn't solve the root problem.
In the same way fiddling with root dns servers is easy, quick, and (temporarily) effective. It's a one-time solution though. If this carries on then people will simply work around the problem. We're already seeing alternative root dns servers, alternative top level (non-US) domains and so on. If the govt. want to waste their effectiveness on such mundane things as movies and music, then so be it. But every time they do it they just encourage more and more people to work around the problem. And the solution is likely to be (already is) more resistant to this form of explicit interference.
The Internet is a genie not going back into the bottle. It is not something that can be controlled, censored, or governed in the traditional sense. As music and movie executives come to terms with what the digital part of 'Digital Revolution' really means, the govt is starting to learn what the real meaning of Revolution is.
The times they are a changin' (again).