From the site:
We’ve all heard the horror stories of Airbnb parties that have left tens of thousands of dollars of damage in their wake, and we all know that we don’t want to fall victim to such abuse.
I really think that this is pretty rare. After all, it's only the 'horror stories' about STRs that get into the media. And with the ones I've read, it's mostly been homeowners thinking that they can leap onto the bandwagon and rent out their lovely home to large groups while they are away - leaving no-one in charge.