Have also experienced this, seriously squashed whilst in a window seat from ORD to LAX, whilst huge sweaty gentleman concerned ate three in-flight meals, and then spent the rest of the flight picking his nose and wiping it on the seat cushion. I can map from memory the whole landscape of the USA along this route
. I just don't see why others should have to put up with this. It's another reason I'd rather have dentristy performed than get on a flight. As for tall people though, that's just the way they are, not their fault.??