I think they don't think AT ALL ... they certainly haven't thought about what happens if the flight is delayed and they are in those shorts, t-shirt and sandals for 36 hours. This might include a night in a very cold terminal lounge, or having to be anywhere at no notice.
The airlines don't like to tell Pax, "Your flight might be delayed by technical difficulties, bad weather, or circumstances beyond our control. Therefore, dress appropriately and have a jacket or other light weight garment. Don't forget to have all your medication in your handcase as you might never see your suitcase again. Oh and don't forget to have a list of important phone numbers if things go wrong because, once your cell phone battery is flat, you won't be able to look up the numbers to be able to call them from another phone. That's because you did leave your cell charger in your suitcase didn't you? And all the luggage is trapped on the plane until destination"
But then, I'm just a boring old f@rt whose been paxing too long ...
