I have, twice! My fault entirely.
Pocket knives. Now before anyone may start thinking the remainder of this post is advocating that one 'should' be able to carry a pocket knife on a plane... NO... I am NOT doing that.
Here's my problem, (making an excuse for myself).... I have carried a pocket knife my entire life. It's as much a part of my attire as underwear. People who do not carry a pocket will often, I think mostly, think this way - - Pocket Knife = Weapon. I get that... but at the same time...
I have never, not ever, thought of my pocket knife as a 'weapon'. It's a tool... no different than a tape measure, a 9/16th end wrench, a roll of duct tape.
Soooooo, the last one I lost going thru security - took place in Washington D.C. I had put it in my checked luggage to get to Washington but once there I immediately put it back in my pocket, as I said... normal as putting on underwear. On the return flight... I forgot.
It was an LS Gerber... best pocket knife I've ever owned. They are amazingly slim and the one I had the blade was half plain edge and half serrated. Handiest pocket knife I've ever owned.... AND... Gerber no longer makes them. IOW... I couldn't replace it.
I told the TSA agent he should just take it home because it was much to valuable (as a tool) to discard but he told me that was illegal. It would be destroyed. (sniff).
My guess is that some you have had items confiscated... maybe nail clippers, or a fingernail file.... I don't and have never carried those items so no problem for me but I think some of you carry those like I carry a pocket knife.
My wife gets an item confiscated every single time she goes thru security at the airport. Water. My wife carries water like Linus carries his security blanket. There is no time in her life when she is not in possession of a bottle of water. AND... she believes she's entitled to water.... that TSA rules are insane so even though she knows the rule she is in rebellion and demands to take her water onto the plane... if for no other reason than to scold the TSA agent for having a stupid rule.
"You're going to hold us up, Mom"... plead my daughers, son, when we're traveling.... she doesn't care.... she is going to test the resolve of TSA.