First, what is the effectiveness of the body scan? I
read that had the body scan been employed, it would NOT have detected the panty bomber's explosive device.
Knives, guns, belt buckles, etc. are all detectable now without a body scan - so if the body scan doesn't add value, and won't detect the chemically initiated explosive devices, what purpose does it really serve?
Second, why does "security" trump all other values?
Here is my modest proposal for non-invasive commercial airline security.
After you check-in, the TSA will escort you to your changing booth, where you will disrobe and don your TSA-approved flight jump suit - purchased via an additional "fee." The TSA will dispose of your clothes and personal effects, so don't bring anything nice or difficult to replace with you to the airport. Once suitably attired, the TSA will then escort you to the standardized blast-resistant passenger enclosure (B-RPE). The TSA agent will shackle you upright into the B-RPE, and then seal the blast resistant door for the duration of the flight, using a TSA-approved B-RPE lock. TSA-approved astronaut diapers are available for an additional fee.
The airline's baggage handlers will then wheel the filled B-RPE into the hold of the airliner, much as the airlines handle the baggage containers today. The airlines will love this system - no more carry on, no more snacks, no more pillows and blankets and best of all for the airline's financial bottom line, no more "cabin crew." This might be a little uncomfortable for the passengers, but it's a tad more acceptable than a mid-flight terrorist bombing.