the passenger who is slightly drunk
And does not show falling overitis, will at altitude become worse.
Added to that the alcohol that he might be served on board, all contribute to the falling over.
The point made about CC not being trained and or empowered to enforce the regulations is most evident in the ME, where passengers are still standing in the isles at push back, and as the runway is vacated, are up and attacking the overheads.
I saw one overweight gentleman, with infant in arms opening the overhead, whilst still at taxi speeds. Not a word from the CC.
glf