Originally Posted by
Icarus2001
It is an OFFENCE to not follow cabin crew instructions.
As has been pointed out numerous times, it's only when the instruction is
lawful that disobeying is an offence. In this case there is serious doubt the instruction was legal, hence disobeying is not an offence.
Unlike what some here have been postulating, you're not devoid of rights once you enter an aircraft. Quite the contrary, actually.