The question was posed to me: under the circumstances i.e. stuck cooped up on the ground for hours, what are the legalities re not permitting a passenger to disembark if they choose to?
I know of a few people who would go somewhat troppo under the circumstances and want to get off, and if they insisted, what legal right do the crew or company have to deny them?
There are the practicalities of course e.g. baggage location and removal if they wanted to move to another carrier etc., but it was the legal issue of holding people against their will that was raised.
An interesting question