I was escorting some classified material one time way back when and was armed. I rode the baggage cart from aircraft to aircraft and climbed aboard. I tried to surrender my pistol to the crew, as soon as I reached in and pulled it to give it to them, they had their hands up before I could explain what was going on. The rest of that flight I had coffee, tea, and food constantly spilled on me. They had no sense of humor.
I needed to make a urgent trip and tried to buy a one way ticket at the counter with only a carry on.
I set off alarms from New York to LA. Needless to say I did not make that flight and since then I always get pulled aside for special pat downs and my luggage is always hand checked.
It is half annoying and half amusing. But I am glad to see them doing their job.