I got a Quad-S boarding pass once. Airline cancelled my planned itineraty, and put me on a nonstop on another airline, one way, hours before departure. I was happy to have the flight. Anyway, TSA does the full monty on SSSS passengers. Just saying, too, that “SSSS” can be assigned for reasons other than posting stuff in public.
When I flyby myself I have no problems getting through TSA and security. When Hubby flies with me we get pulled for the full Monty every single time. They flag us at check in. Someone told me once that it is his military record. Have no clue why but it happens every time.
Yep. If you PO a ticket agent as you check in they are known to manually 4’s you. Also if you draw a positive in the swab test for explosives they take your info down to include DL a/o passport info. The positives I have seen were always false alarms due easily explainable reasons but your are entered on a list. What that entails I don't know but I doubt it is for your traveling enjoyment.