If a site outside the U.S. thumbs its nose at U.S. copyright laws, it can expect that if it got a domain name from a U.S. domain registrar, it might have problems.
However, the fact that it's the Department of Homeland Security, and not the FBI, that's doing this strikes me as the potential danger to liberty. Oh, we happen to have these emergency powers lying around for use against terrorists - gee, let's use them to help protect our friends in Hollywood too.
Yes, that kind of mentality could lead to danger to freedom. Emergency powers required by something as extraordinary as terrorism... are outside what the Constitution allows for dealing with ordinary, routine crime. The Constitution not being a suicide pact is not supposed to mean that the Constitution is a dead letter, remember?
Guantanamo had to be in a place outside the U.S., under military jurisdiction, because Bush was afraid the courts would turn terrorists loose on technicalities.
At one time, Americans were free - but the courts exercised common sense and discretion in applying the Constitution to things like terrorism. Absent common sense and discretion, the choice becomes one between preserving freedom and protecting people's safety.
But it doesn't have to be that way; that doesn't have to be an either-or choice.