The U.S. Government has to walk a tightrope of taking down enough sites via DNS seizures to appease their RIAA and MPAA masters while not taking down so many sites that people wise up and switch to an alternate DNS scheme like OpenNIC.
Sure, you can even put the IPs on your hosts file. But 300bps was talking about the "people" in general switching to OpenNIC - and I think that it's unlikely enough that they'll do that, much less that they'll start tunneling their requests.
http://www.opennicproject.org/
EDIT Anyone that thinks the U.S. Government didn't pressure the various governments involved to do the actual takedowns is naive.