I have one of those little folding tools that has a knife, scissors, file and then some on my key ring. I fly a lot and take it off my keys when I travel. One day I forgot to take it off. I didn’t realize it until I got to my seat on the plane and went to grab my reading glasses from my purse. I was mortified when I looked in my purse and realized I just “smuggled” this thing on the plane with me.
At first I felt terrible but then I said to myself, hey, I just got through security with this thing.
On the way back I packed it in my suitcase. Overall, this was an eye opener regarding the level of security at airports for me.