And another commenter revealed their own hypothetical revenge, writing: "I would have fake sneezed on their toes with just a sprinkle of water.
But when you've got passengers in all directions invading your personal space, it can become even less of a desirable situation - whether they're manspreading into your area or elbowing you for the armrest.
Digital creator Cam Casey couldn't help but chuckle at the "instant karma on the airplane" dished out to a woman after blasting her behaviour as "nasty".
One person commented: "Isn't it possible she fell asleep and didn't realise her feet moved or that she was beyond the chair edge?
Planes are cramped and a bit grim – the only saving grace is the fact you know you're going to be somewhere delightful in less than a day.
