COUPLE TOOK MY PREMIUM SEAT ON THE PLANE – SO I TAUGHT THEM A LESSON AND TURNED IT INTO PROFIT. I was comfortably settled in my aisle seat enjoying the extra legroom, when a couple rudely approached. The woman, exuding entitlement, demanded, "You need to switch seats with me. I messed up the booking and won't sit away from my husband." I glanced at her ticket — row 12, middle seat, far from the premium seat I'd chosen. She scoffed at my hesitation and added dismissively, "I…