I recently took a flight from the Netherlands to Italy. On that flight I used as only luggage a backpack, which I normally use for daily shopping.
On my arrival in Italy I noticed that I had forgot in my backpack a 500 ml brick of tomato sauce. Apparently it went unnoticed through the security controls.
Should I report this to the departure airport? My main concern is not that I did something forbidden, but that their security controls are somehow lousy.