Last week I inadvertantly tested the screeners at 2 airports (Leonardo in Rome and Heathrow) and both times I'd left a pen knife in my bag and a couple of razor blades. Now I feel very daft for having done this, but I was shocked when I arrived home and found them in my hand luggage. They didn't even register a rummage through at either airport.
I'm just wondering who I should tell about this. (apart from everyone here that is!)