"fear of walking the streets alone at night"
It depends on where you live. If I'm in Detroit, then yes, I will be a little more apprehensive about walking on the streets alone at night. It's just common sense.
"Fear of someone spiking your Tylenol"
If someone hacked into your servers and destroyed data through a weakness, would you fix the weakness or just restore the data and go on with your day? The Tylenol weakness has been fixed. It's the smart thing to do.
"Uncontrollable fear of a country across the ocean maybe having WMD's."
I love how you slipped this one in here. I actually would love for the US to stop all military actions and then have a major terrorist attack. I know I would be the first to blame all of the people who said we were too "paranoid".
It's funny because the reason people can sit and talk about all of these things we don't need is because all of the precautions we have in place are working. Kind of like the person that's bi-polar that stops taking their meds because "I feel fine, why should I keep taking them"?
"Until we learn to control that basic fear response, the TSA will still be around and people will still be scared of sitting next to a dark-skinned man kneeling in prayer."
Until the people in the middle east get their shit together, we will need it. We don't know how many attacks have been prevented because of high security (IE: not even bothering to try).