As you tiredly settle into your seat on the plane, the hum of the engines fills the cabin, creating a soothing backdrop for the long flight that awaits. Two seconds later, you notice the person who will occupy the seat next to yours… And you can already tell it won't be a fun flight. Oblivious to the unwritten rules of airplane etiquette, they take up the empty seats between you. That is exactly what happened to u/Leather_Ad_5602, who told their story about an annoying passenger on Reddit. This…