Here's some guests who caused some problems.

http://www.latimes.com/local/lanow/la-me-ln-airbnb-party-hou...

http://www.nydailynews.com/new-york/unexpected-sex-party-des...

http://www.nbcwashington.com/news/local/Md-Man-Says-Airbnb-G...

http://www.businessinsider.com/how-an-airbnb-guest-trashed-a...