Etrang
I agree.
Also, I wonder if the people responsible for offloading the bags considered whether anyone was carrying medication?
The airport security advice is "Remember to take only what you need for your journey. Extra supplies and larger containers of medicine can go in your hold baggage" (source DirectGov.)
Given this flight was on Boxing day, finding an available doctor/dispensing pharmacy in a ski resort might have been something of a challenge and at the extreme may have required a trip to the nearest hospital for treatment.
The same applies to people travelling with babies, although food is probably easier to find, sterilising equipment for bottles may not be.
I would think that they should be at least aware their bags would not be waiting for them.