Originally Posted by
MSPeconomist
... I discovered this when I tried to get past TSA security and my boarding pass didn't work. By the time I went to the counter (the kiosk didn't even show what had been done) and waited in line for over an hour, I could no longer get onto the flight I had wanted, five minute delay or not, and the GA refused to add me to the standby list.
I am surprised that the TSA validation system actually checks against the current passenger list on a flight. Thought that it simply validated a properly-coded boarding pass, not against internal airline lists.