I did sat "daytime" ovrseas flights - of course you have the shades down at night! And economy is a different story - more people. less privacy, most impact on entire cabin since seats are so close together. But FC is less intrusive on other passengers if the shade is open a bit. What I hear from FAs is that they are supposed to suggest putting shades down, but not to make an issue if someone wants to keep them open a bit.

We always try to be considerate of other passengers and would like them to be as considerate of us.