Paris
Short story:
Paris CDG last year.
Arrived CDG in preparation for annual sim course to discover that KLM had lost my bag (shock!). Baggage said it would arrive first flight the next day and that I should pitch up at the Arrival baggage office, ie on the "wrong" side of customs.
Hmmm says I, how do I do that when coming from land rather than air-side? "Oh that's OK", i'm assured, "just use the staff door behind the customs desk, if anyone challenges you show them your pass it'll be ok." Really?
And yes it was, nobody actually even questioned why this unidentified guy in civvies was entering the Airside part of the terminal, effectively "behind" ALL security, metal detectors, check-in etc
To say i was surprised would be an understatement and I'm not convinced it's any better now....
Cheers