Flying back from DEL a couple of months ago. After dinner, I dutifully dimmed the window next to me, even though I would have liked to look out a little more. But the passenger seated in D started shouting at me 'Shut the blind! You haven't shut the blind! I need you to shut the blind!' Itried to explain that there was not a blind to pull down, and that the window was fully dimmed. The cabin crew tried to explain to her as well, but she would not be persuaded...