The worst thing about going through airport security and having, say, your sweet, sweet honey confiscated, is that you can probably buy a replacement from at least one of the shops in the area between the security gates and the departure gates. This security theatre is justified on the grounds that only stuff that’s harmless is allowed beyond a certain point – so it follows to reason that everything those shops sell should be pretty much useless when it comes to taking over a plane.
Except, no.