It’s good that people are trying to think the whole notion through, the discussion will be messy.
I can think of better ways to implement the notion. And I’d want stretch breaks - sitting for 9 hours is not good for health.
(Jokes will abound - and what is that hole and human hand where the right seat usually is? Oh, on second look it seems to be a loop of something blue and a pair of leggings and lap blanket or skirt not in flying position. I hope Russ didn’t pay a lot for that photo.)