This conversation will be moot in due time - as soon as another terrorist attack occurs, the sophomoric American public will pull out their American flag lapel pins, their yellow-ribbon bumper stickers, hug, cry and go to church together, hang flags from their houses, and gladly put up with airport security screening - the whole time shaking their fists asking "how did this happen?"
Security is a joke until we start aggressively profiling, BUT the same people who now complain about the pat downs and scanners complained about profiling. W T Fuck.? Like it or not, invoke the name of whatever founding father you want - there must be some sacrifice of liberties for some semblance of air security. Finding the threshold where we give too much of one for the other is the tough part. IMO we're not near that threshold yet.