There are lessons of history to refer to. Lincoln violated many civil liberties during the civil war, they returned after the conflict. Wilson and Roosevelt did the same. Roosevelt incarcerated tens of thousands without justification, that didn't continue and now we are rightfully ashamed.
I think nowadays, it will be harder and harder to get anything turned back to the way it was before 9/11. I will still rather take my chances on safety and secutity, and keep my liberties as an American.