Fun story: in the 1980s I flew with a co-worker on Northwest DC-10. Co-worker was a tall solid guy. Person in front tried to recline their seat into his knees. Knees prevented full recline. Person complained to FA. FA yells at my co-worker telling him he has to move his knees to facilitate full recline for person in front.
I'm 6-5, really long femurs. This happened to me one time as well. I told the flight attendant to move my already spread and jammed knees for me. She quickly realized that there was no orientation of my femurs that would make everyone happy.
