Who cares if there aren't privacy implications? It's still security theater and should be opposed on principle. Anything beyond metal detectors is pointless. You can't hijack airplanes anymore because the other passengers won't comply with hijackers anymore; that was proven on 9/11, long before any fearmongering bureaucrats imposed any of their corrupt theatrical horseshit.
Would you be interested in purchasing a tiger-repellent rock from me? I can guarantee that if you purchase one of my rocks, no tigers will eat you. They're real rocks, I assure you.
