Fortunately neither the Australian Government nor the American one can do anything about the Internet.
Yet.
Since you are the resident terrorist, can I have your autograph?
But seriously, it does raise some very disturbing issues of Free Speech. I dont know how entrenched that concept is in Australia, but it is the First Rule here, and so far that has allowed a lot of hate speech, and a lot of things we dont like to happen (crucifix in a jar of urine) occur, but almost without exception, left and right swear by it and accept the bad with the good. No rational person wants to touch it, for fear of breaking it.
There is always the Caymans. That is why the US government is smart enough to not even try.
It may be reversed soon. Even if it was never true to begin with.