Originally Posted by
seat38a
It's funny, in the video of KE that I posted in my original post, at 3:15, it's of the upper deck of the 747. Right side has no smoking sign on the headrest cover and the left side does not with a guy smoking. My family and I have been assigned non smoking just a row or 2 ahead of the smoking section on our trip from LAX to IAD as a kid. The cig smoke never got the message that it was entering the non smoking section of the cabin.
It was particularly bad in premium cabins. Sometimes there was a bulkhead or divider in coach, but the F cabin might be nonsmoking 2 rows and smoking 2 rows, right next to each other.