[386wt]

...all pressed up against the seats in front of them?

Heard that some overseas airlines are now offering a "sedate" class. If you are willing to be sedated they have a special section that "stacks" you vertically with just an inch or so clearance to the next "sedated and stacked" pax. A nurse accompanies each flight.Check it out.

[oh8eleven]

they have a special section that "stacks" you vertically with just an inch or so clearance to the next "sedated and stacked" pax.
Not unlike the "hotels" that cheap Japanese businessmen use when they have to stay in town overnight.