Originally Posted by
lamont2718
Unpredictability in security procedures is a key element of TSA's approach. They have also been open about this -- you'll find the following language at tsa.gov: "TSA will always incorporate random and unpredictable security measures throughout the airport."
Which is fine, except, and speaking as someone who was involved in real security in a former life, the way they do it has little to no effect what so ever on actual aircraft (let alone pax) safety. They display an amazing ability to target the least effective areas and methods for their games & theatre.
If you want to see a good, balanced approach to security try Japan, Germany, or (on most days) China.