Tell me something as an aside - it you're heading to or from a sun-destination, are you in sandles and shorts if arriving or departing a place like Denver in the winter? Not being a smart-axx here but I've seen passengers wearing t-shirts, shorts and thongs (the kind that go on feet...) all excited of course but an evacuation like we've just seen with such unpreparedness can really add to injuries and hypothermia. Just curious - used to see it all the time and wondered if most know that they're in an airplane in winter... ;-)
Most passengers don't think about the prospects for an evacuation when they decide what to wear or not wear on an airplane. A few don't think at all. I've seen folks on flights from Florida to points north wearing sandals and either shorts or swimsuits without shirts (men and women in case you're curious).