This isn't really embarrassing for me so much as it was for the security guard but...
On returning home through Manchester earlier this year, I was two breaths away from crying all through the security line. As I approached the scanners, I handed my clear ziploc baggy of film to the guard and politely asked them to hand-check. The nasally accented return was "No" and "We won't do that" followed by the age old "The machines won't affect your film."
Now, I've flown enough as a photographer to know that yes, the machines, especially the modern ones, will affect my film. I realize, however, that not everyone might know that, so I sucked up my losses on 10+ rolls of film (some high speed, many unprocessed), and let it go.
Or rather, I would've let it go 'mentally' had I not caught the same guard out of the corner of my eye making a snarky laugh and comment to her coworker about how she just lied to me, and how these stupid passengers expect guards to yadayada, so on. You can of course imagine that my rolling of the eyes at her as I picked up my laptop and repacked my bags was quite reflexive.
Still several breaths holding in tears, might I add.
Just as I pick up my backpack to walk to my gate, a tentative middle-aged guard approached me and reluctantly said he had to search my bags, that they saw something "suspicious" and just wanted to "make sure."
I swear, I never heard so many apologies in my life. He was afraid to look at me! I had to take out alllllllllllllllllllllllllll of my camera and computer supplies and peripherals for him to look through (I never check any photographic or computer item), my lips quivering and eyes watering and nose sniffling the entire time. You could tell he was genuinely upset and apologetic for doing it, and that I was only picked out because the snarky female guard wanted to "teach me a lesson**." In fact, I think I even smiled despite wavering in tears, because he recognized that a young woman crying over leaving her boyfriend should probably be off-limits when it comes to picking on customers.
I mean, gosh. I got better treatment of myself and my equipment flying in central america. I'll save my immigration officer complaints until after I'm safely in the country come September...
**Not a conspiracy theory -- I've been selected for searches before, when the scanning guards have a question about what's in your stuff, they don't wait for you to repack it before bringing you aside.