So on hour 14 when the Sun is coming up, perhaps having gone 36 hours without real "rest," they prevent you from blocking the sun effectively, nor can you put your head down to read something more engaging than an MEL, thus you squint at the little screens in silence. If there ever was a recipe for sleepiness, this is it, and now they're going to give you static for sleeping? Ask that inane flight attendant is she's ever curled up in a back row during a long, mostly empty leg. Hypocrite.