Not to engage in schadenfreude, but on my Amtrak trip, the closest we got to TSA is the brown uniforms in Havre MT asking those in the lounge car "Are you American?" When they left the car, there were a few jokes. "What if I answered, 'Yes, infidel', or 'Just visiting, eh'" Of course any of that would be like saying "bomb" or "hijack" in an airport. Given where Havre is, no one wants to be put off a train there.