And what would that reason be? Some terrorist bomb go off in Apache Junction that we didn't hear about?
You wimpy idealists don't know when you have it good. You are only happy when you are miserable.
I don't think you're able to substantiate, with real empirical data, which of the knee-jerk reactions to 9/11 imposed by the Bush administration (vis-a-vis the Department of Homeland Security) have been effective and which haven't.
What we do know is that 9/11 hasn't happened again. Is this because we've prevented people from taking precisely 3.6 ounces of shampoo on airplanes? Is it because of air marshals? Is it because we blew the dog shit out of Baghdad?
I'd love to know, so that we can stop doing all of the things that didn't work. Otherwise, the next logical step in your fucking idiotic line of reasoning is to outlaw rice and masturbation, because some terrorist somewhere ate a lot of it and liked to beat off. You'd be all to happy to oblige, and probably report friends and neighbors as terrorists, because it made you feel "safe" from the big bad scary world.
Freedom isn't always simple; isn't always safe. That's one of the prices of a free society. Turning the government into a giant, multi-trillion dollar per year nanny doesn't make us "more free". It doesn't make our freedom "better". It just allows fascists and totalitarians to impose their will, unfettered.
You should really read up on the history of the Nazi party - before and after the war - including their war crimes trials. You might be amazed how much you sound like one. As you may not be aware, those who are ignorant of history are destined to repeat it's lessons. That particular chapter from our past is one I think we'd all prefer to consider lessons learned.