Check Airman,
I presume they meant a securely lockable door was absent.
Andrej,
So what exactly was the brilliant idea? Serving the stowaway lunch or pulling the window shade down? The former was a certainly a nice touch, in keeping with SIA's reputation for superior IFS. The latter, I'm not so sure. As he wasn't restrained, surely the interloper could easily have pulled the shade up and taken a peek. Anyway, when they began the descent he must have realized they hadn't already reached AMS.
Rockhound