Originally Posted by
Peregrine415
What puzzles me is why passengers are detained (until boarding) after screening--apparently so they don't mix with other passengers in the waiting area but can mix with them on the plane.
Yes, that's the crux of the question--what is the possible rationale for sending randomly selected passengers through a secondary screening, and then holding them in another room, before letting them on the plane? They present a security risk in the airport but not on the plane? That seems like a major over-reach of authority, a forced several hour long incarceration of passengers for no reason other than "TSA".