I was on a red-eye business-class flight from London to New York, trying to get some rest before an important meeting. I had splurged on the seat just this once, hoping for a quiet night. But the woman beside me had other plans. The moment I sat down, she was already celebrating loudly, chatting on her phone about her recent divorce and her trip with her best friend, Chloe.

When she realized Chloe was seated in economy, her attitude shifted instantly. She turned to me with an exaggerated smile and asked me to switch seats so they could sit together. I explained politely that I couldn’t—I needed the rest I had paid extra for. Her smile vanished, and within minutes, she launched into a campaign to ruin my night. First came the overpowering perfume, then a loud video call complaining about me, and finally kicking the divider between our seats. I tried to stay calm, but when she intentionally sloshed her drink toward my laptop, I knew I had to take action.