It's not a case of what you know but who you know. Bit like all airport security intelligence is the key. Once had an ex at a busy International airport wander onto the ramp and into a 74F with Load sheet,F/P etc and just asked her to ask the skipper if PLOG fuel was OK. I was knackered and couldn't be bothered
I trusted her, and a lot of this is all common sense, someone somewhere was looking at those manifests......