Only last week when going through security, whilst I was having to put my bag through the x-ray, take my jacket, belt and shoes off, get frisked, then also have my bag opened and search did I notice an airport cleaner collect bottles of bleach, floor cleaners and various other cleaning products coming through the x-ray!!!
I know they have their jobs to do as much as we do but lets have some common sense.
A 1.5 litre bottle of water or bleach/cleaning products mixed in specific quantities which are more dangerous.
If a pilot wants to do damage to an aircraft he wont need explosives, wires, deternators, knifes or that ultimate weapon of mass distruction the bottle of water!! - he has two hands to fly the aircraft in whichever pitch attitude and direction he wants.