Well I don't agree with everything homeland security is doing, but my life hasn't changed a bit since 9/11.
What I mean is I still travel, been on 3 vacations in the last year. My day to day life has not changed at all, I do nothing differently now that I did last year. I don't worry about being bombed, shot, nuked, poisoned, etc. I have a much greater chance on dying or getting hurt driving to work everyday than any of the items I listed.
Cameras in stores, street corners etc. I don't steal, beat children, kill anybody, build bombs, run traffic lights, speed (ok maybe speed) even with that many people in this country believe yoiur only breaking the law if you are caught. If I am arrested for such things by mistake, it happens they can search my house, talk to my friends etc. and I will be let go.
My life is an open book, and I don't mind these measures...they are not extreme in my mind.