First, this wasn't a redeye. It was a late midcon.
I'm shocked at the number of people that must travel in complete silence. If it's really that much of an issue for you, travel with earplugs or a noise cancelling headset (or fly private or at a different time). If someone is that loud, ask them to please quiet down and go from there. I plan on talking all I want on the flight, especially when with friends.
I seem to be in the minority here, but I do agree about the light on redeyes; keep it off (I guess I am more light sensitive).