People can see the real danger that terrorist pose. However, they fail to see the real threat that a fully surveilled society poses. The 'control' that the nazi occupation had on it's society will pale in comparison. I'm not trying to be an alarmist by saying that, I'm not saying the control over the population will be used the same way, I'm saying that the control will be much stronger and harder to fight if it were ever needed.
People say that they have nothing to fear because they aren't doing anything wrong. While they may not be doing something wrong by today's measures, that may not always be the case. If you keep giving and giving controls to elites, it will in all likely hood, one day be illegal to speak negatively about the elites. After all they don't want anything threatening their power. If after something like that does occur, and things aren't where they want them, why not take care of anyone who's ever spoken out against someone in power in the past.
People like to think this is far fetched, but we are already taking steps to get there. Right now, you say anything threatening about them or you'll find yourself in a heap of trouble. Even if it's obviously light hearted and not at all serious. Gradually the definition of what is 'threatening' is changing. It doesn't take much of an imagination to see that one day it could be threatening to say anything negative at all about the people in control.
To preserve freedom, there has to be an avenue for decent. Just because 'I have nothing to hide' doesn't mean that I want the avenues for decent to be closed. That's the scariest part to me. When there is no possibility of decent, there is no end to the possibilities of human abuse on the largest scales ever known to mankind. Our world is full, there will be no where to run, there would be no way to get there if there was a place. If there were such a place, they would be able to quickly find you. There would be no chance of a large enough group to get together to help put things back in balance.
I watched the original Red Dawn a few months ago, and while I was watching it, I thought to myself, the resistance that the young guys put up would not be possible with today's technology. Simply with drones and infrared cameras it would have been game over. Add into that the lockheed martin laser that was up on slashdot a few weeks ago that could zap a truck engine from a mile away...
I'm not saying that the powers that be will ever force these kinds of control over the masses, but why wouldn't they... if there was nothing to stop them? They've proven their scrupulousness time and time again. I just don't have that much faith in them to say 'go head and spy on me, I've got nothing to hide'.