A most disagreeable experience to be sure. But, despite years and years of it, some people still don't prep themselves before going through security, still carry liquids in their hand luggage, still don't take off their belts, watches etc., despite numerous notices, and numerous people on the way advising you what needs to be done. I am not excusing rudeness by staff of course, but I think if I worked at an airport I would get rather cross when yet another passenger didn't think that the rules apply to them. However, nothing, but nothing can compare to the hostility and aggression of USA airports where everyone it seems, is treated as a potential terrorist.