Inconsistencies, whilst aggravating for us, actually provide for better security as you never know what is going to be checked.
is all very well were it not for
Except for when you get shouted at for taking shoes and belts off as it causes congestion at the other side of the scanner.
I don't mind such different procedures, provided that the security staff don't start their own aggression against me when I somehow have not realised what is required, today, at this particular point. And it's not nearly as much varying procedures for this randomness, as different ones expected at different airports.
About the one consistency found pretty much everywhere is 7 sets of checkpoint equipment installed, but only 3 staffed. And when this finally causes much criticism, the answer is commonly - to install more equipment. Because on the airport agreeing the budget for it the equipment salesman got there first.