We’re not saying this is the way things should be, but it’s the way things are: If you’re going to use Airbnb or some other service to rent out your house like a hotel, you need to know there’s a chance that the people you let stay in your home while you’re away might also see it as nothing more than a hotel room they can mess up and leave behind. In a lengthy Facebook blog post, a California woman recently explained her horror story with an Airbnb guest who allegedly left behind thousands of dollars in damage and — according to the homeowner — may have been running an adult business from the house.