Originally Posted by
We Will Never Forget
It's a simple concept: avoid a passenger from leaving the checkpoint without the determined amount of screening. Should a passenger arrive at the gate without it, they cannot be permitted to board. If someone chooses to miss their flight, nobody cares.
Well thanks for dumbing it down

, but, in reality this simple concept often isn't the case. Think about late stage transferrees who get flagged as SSSS behind the security check-point. This SSS is, IME most often ignored by GA's.
SSSS is really just a farcical addition to the basic airport security farce. The concept that you can use some sort of algorithm to determine what the "determined amount of screening" should be is laughable and worthy only of the deepest contempt.