The trouble I have with airport security, and working at Stansted means I deal with it several times a day, is that there is no consistency. Sometimes I have to put my yellow jacket through, sometimes not. Sometimes they want the van emptied, sometimes not. Sometimes they want to check your passes, sometimes not. It makes for a jarring experience when one minute you fly through with a bit of common sense as we only came through 5 mins ago, and then just because there is a DfT inspector standing there they want the bonnet lifted, every toolbox off and x-rayed, stripped down and shown the special glove etc.
That's extremely irritating, believe me.