My last 787 flight LHR-LAX I was in aisle seat of the exit row and one of the two teenage girls sitting next to me "opened" the shade of the little window on the door mid-flight. After taking turns looking out they both sat down leaving the shade un-dimmed.

I quickly jumped up and re-darkened the shade as it was apparent they didn't have any intention of either a) continuing to look out the window or b) dimming the shade in respect of the rest of the cabin.

Prior to that I wasn't even aware that the door's window had the same control button.

Admittedly I was a bit of a jerk about it but they had already gotten on my nerve before takeoff by trying to get me to swap for a middle seat so their other friend could sit there. When I said no they gave me attitude which I didn't appreciate.