Overwhelming majority of rental cases on AirBnB are ending very well. I just recently used AirBnB to stay a week in a 1br apartment owned by a nice family in a great location for 1/3 of the price I'd pay for more inferior hotel. I would never think of doing anything to harm my hosts. 99% people think the same. Of course, there's also 1% of the rest, but if you live your life worrying about the percentage of psychos in the population, you only will be hurting yourself.