OK, I'm only a paying customer and I don't know all of the details but for what it's worth...
When I fly, I put my life in the hands of the crew (those at the pointy end and those who's job it is to help me off the plane if something goes wrong). I want those nice people to be as calm and unhassled as possible. The crew have a difficult enough job getting me from A to B without having any extra BS to deal with.
I can't do the risk assessment so I don't know if any sort of security check is needed for the crew (there have been fors and againsts in this thread). However, if checks are needed they should be short, efficient and professional. Above all, they should not be in the same line as us, the punters - that just leaves everyone (crew and pax) feeling awkward.