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The great window-shade debate

Airplane question for you: If you're in a window seat, do you keep the shade up or down?

We raised this in our morning news meeting a few days ago, and the room erupted into a fierce debate over flying etiquette. This is up there with whether reclining your seat is appropriate, or society's unwritten rules around airplane armrests or taking off your shoes and socks.

For some travelers, open shades offer a lot of positives. You can watch the clouds, take a photo, or just feel a little less claustrophobic at 35,000 feet. (I'm shades up, for sure!)

For others, leaving the shade open is an act of selfishness. Sunlight pouring into the airplane cabin can keep half the plane awake, or cause glare on laptop or tablet screens. These folks very much want the shades closed. Flyers have been intensely litigating the issue on Reddit in recent days.

So, who's right in the window-seat debate?

The practical answer depends on the moment.…