"You ain't takin' this through," she says. "No knives. You can't bring a knife through here."The whole thing is worth reading. As the author (an airline pilot) asks, "Do I really need to point out that an airline pilot at the controls would hardly need a butter knife if he or she desired to inflict damage?"
It takes a moment for me to realize that she's serious. "I'm... but... it's..."
"Sorry." She throws it into a bin and starts to walk away.
"Wait a minute," I say. "That's airline silverware."
"Don't matter what it is. You can't bring knives through here."
"Ma'am, that's an airline knife. It's the knife they give you on the plane."
(Via Bruce Schneier.)
