You arrive home after Airbnb-ing your home to find that the back deck is gone--during a particularly rowdy party hosted by your Airbnb guests, a smoldering cigarette negligently left on the railing started a fire, which on that hot, dry, summer night, quickly engulfed the deck. But the fire didn't stop at the deck; the entire back wall of the house, covered in weathered shingle siding, was singed and blackened to a crisp.