Warning - RANT
If you can't keep your body within the confines of your seat, then either purchase 2 seats or accept the right of your fellow passengers to drop a guillotine between the seats
Why do I have to spend my flight being constantly hit by passing passengers, stewards and trollies as I'm wedged so tightly up against the aisle armrest that my shoulder is hanging out into the aisle and I'm tilted so much into the aisle that my side/back is in agony
I'm not asking you to give me part of your seat, just allow me to have use of my own