Are we missing the big picture?
disarm the crew of nail scissors and allow all kinds of mavericks to board with copious amounts of duty free i.e. 40oz. bottles of very flammable liquids!
I bet next time you are in the left seat at 30West and some drunk pours several bottles of whiskey onto the aircraft carpet and holds up a packet of matches, your attention will be focused.
Its ridiculous that we still have duty free sales at point of departure rather than point of arrival, at least from the security point of view as outlined above!