My proposition is that many of the most obvious security measures in the US today are unnecessary and undesirable.
Consider the last time you traveled via airplane. What were you required to do, and what did that protect you against?
I contend that current airline searches are excessive in terms of any reasonable goal. They are an over-reaction to an isolated event. 9/11 was undeniably horrible, but could have been prevented by far less than current security. Namely, strenghtening cockpit doors and refusing to open them. Everything else beyond a single passenger carry-on screening takes us farther down the path of diminishing marginal returns.
I also see several costs associated with the current measures.
They direct too many resources towards what our enemy - to the extent our enemy exists - did in the past, rather than directing those resources towards what terrorists might do in the future.
They will discourage people from flying, and cause economic harm to the airlines and travel-related businesses.
As they are not aimed at any specific reasonable threat, they foster an unfocused fear among Americans.
They create a false sense of security, as they emphasize the appearance of a significant effort, as opposed to less obvious potentially more effective measures. In effect, they are primarily an exercise in public relations.
I feel similarly about security in and around many large office buildings.
Anyone out there agree/disagree?