Host: “If you don’t pay the $200 cleaning fee in cash right now, I’m cancelling your booking.” I looked at the guy standing in the doorway of the beach house I’d booked on Airbnb. Me: “The listing explicitly said all fees were included. I’m not paying extra cash on arrival.” Host: “My house, my rules. Pay up or get off my property.” I was exhausted after a six-hour drive, but I refused to let him shake me down. I pulled out my phone to call Airbnb support and report the extortion. Host: “Go ahead and call them! They won’t respond before tonight anyway, and you’ll be sleeping in your car!” Before I could dial, a red pickup truck pulled into the driveway. An older man stepped out, looking furious...