Originally Posted by narvik

FA's won't like this new rule: it means more work for them!

IIRC all window shades are oftentimes closed during hot, sunny weather to reduce the plane's interior heating up, as the plane just sits there on the ground.
Now the FAs not only have to make the announcement to open the shades, but also have to go down the aisles and open (or shut) them themselves, if there's no one sitting in a row.

I already foresee them demanding a service or service item be cut, to avoid them from getting overworked.