Once I was flying out of Stockholm, and behind me in the security check was a handyman who was just passing security to fix something on the inside. He had a small open toolbox on wheels with him, so after I went through the metal detector, they pushed his box through, which obviously beeped, since it was full of screwdrivers, knives, hammers, and a lot of other sharp metal things. And then the handyman went through, and he also set off the metal detector, so the security people started checking him and patting him down.
So noone is looking at the toolbox that I'm standing right next to. I could easily have grabbed a knife or two if I had wanted to.
And once they finished patting him down, he grabs his tools and walks on.
And I'm just standing there, gaping at the stupidity of it all.