When I flew to KC last summer(out of Newark by way of Atlanta), I had flipflops on, had checked my suitcase and only had my purse. I had to remove the flipflops

and put those and the bag into the xray doohickey. I'd worn the flipflops thinking I wouldn't have to take off any shoes and hold things up, plus the idea of being shoeless in a public place rattles me. When I remarked "You're kidding, right? They're flipflops!", the agent just shrugged and said, "You never know what can get stored in those...."
When I arrived at Atlanta, knowing I had at least an hour before I had to board, I strolled, saw their smoking lounge and reached into my bag and....
pulled out a Bic lighter. Didn't know it was there. I was Queen of the smoking lounge

"How'd you get through with that???" Stupidity, I reckon...
I got through KC with it too coming home. And sat waiting for the flight watching a man, apparently of Meditteranean descent, get thoroughly frisked.
Airport security is just full of bad jokes....