[Boeing Guy]

Boarder Control.....ha.
At UK airports the Immigration people have a nice board behind the desks saying 'UK Border'. Now if I were a terrorist, I am not okay!!!!, I would simply copy a Airside pass from some obscure country, say Morocco!! (my Moroccan pass is a lot easier to get hold of than my UK one was) and waltz through the crew section, with a newly purchased Crew uniform.
Yes, you may need a passport, but it only gets a quick glance as Air crew are trustworthy. If it's a European one, they might not even bother to open it.
It's a joke, so called border security.