Seen AF do it on eastbound flights to Asia.
One spectacular Spring dawn as flew over snow-bound Balkans starting taking photos from window seat, was told by noxious CC to shut window and go to sleep. I wasn't aware I'd spent £500 to travel Air Rendition or Nanny Airways. I was stunned. Notably, the two people sat to me were also wide awake and couldn't care less, in fact were staring out the window too. And it was light outside for crissakes.
There are a dozen things that keep people awake on a flight and open windows is the least of your worries (children screaming, people yelling, trollies bashing, announcements, etc etc).
Yet ANOTHER reason to never fly AF again.
Clearly was CC just wanting to "subdue" cabin. Pretty selfish and futile. They could have just handed out melatonin and whisky.