Kimberly White/Getty I have been an Airbnb host in San Francisco for about nine months. Last January I watched Katie Couric interview Airbnb’s 34-year-old billionaire CEO, Brian Chesky, and that’s when I realized that something didn’t add up. Testing Airbnb's claimsCouric asked Chesky if his company inspects its hosts’ homes for safety and fire hazards. Chesky replied, “We want to be a gold standa