Ronald Reagan's assistant Treasurer, Paul Craig Roberts has been blogging away in an increasing rage about the abuses of government for several years now. (But who's paying any attention to him?) This is the first time I've read such a drastic conclusion on his part, although I must admit that I have been wondering for a good while myself whether there is any hope of avoiding devolution of the US into a police state from which there is no escape and asking myself whether the Jews who escaped Germany in time to avoid Hitler's camps and ovens had a clear indication that it was time to go. In fact, I would probably advise Americans of Middle Eastern origin to seriously consider moving their families out, because I don't think it's going to get any better for them here for a very long time, and I think it might get a lot worse.
Read Roberts' article - one of his more lengthy posts, as it clearly discusses the Awlaki assassination's meaning for civil liberties and the US Constitution among other things.
....but hey, do what you want....you will anyway.