Perhaps a pre-landing briefing could be made:
In the event of an evacuation, those idiots insisting on retrieving cabin baggage must remain seated until all those without cabin baggage have deplanned.
Passengers evacuating without cabin baggage are encouraged to trample over any idiot blocking an aisle while retrieving cabin baggage as that will ensure the fastest possible evacuation and the best prospects of survival for all on board.
We suggest that passports and vital items be secured on your body before the landing approach