In reply to Neil Williams:
There's plenty of stuff for sale in departure lounges that could be used for all sorts of nefarious purposes, which makes the whole thing a joke.
They won't let you take ropes and slings, as they could be used as restraints, but will happily sell you a variety of belts and key lanyards once you're airside.
In the book of On Her Majesty's Secret Service, Bond uses his Rolex as a knuckle duster to floor a henchman. Can't see them banning sales of heavy watches, though.
Etc, etc...
Edit - have been checking airport regs for baby food and you can bypass the 100ml liquid rule for their food, within reason. I'm expecting an argument with security when we fly to Australia in November, as we'll probably be carrying more than we need in case of delays and not counting on being able to refrigerate 1/2 used food...
Post edited at 10:49