Problem is there are weapons and there are weapons
One mans weapon is another mans safety equipment.
One does not need to bring a hammer on to the flight deck.
A plastic knife from the catering tray is in my opinion more dangerous than a metal one.
A finger in the right place can cause death almost as quick as a "weapon".
Dury free liquids are as dangerous as any fire starter under the right circumstances.
Breast milk, is not as dangerous as they think....