I had the opportunity to hear the founders speak a number of times. They're one of the very few founders that are incredibly genuine about bringing a positive change into the lives of their customers. They live and breathe positive change they bring to the world, to the point where they carry letters from customers that thanked them for saving their lives because the bank would have repossessed their home if not for AirBnB. Jumping on them because they didn't have a chance to give a complete response while handling a crisis is really uncalled for.
I don't know the victim but it's easy to misinterpret events after going through an emotional trauma. Most likely it's a misunderstanding, but even if it isn't, it's really inappropriate to insult people given the information currently available. In fact, it's never appropriate to insult people, and it's best to hold back criticism until more information is available, lest you do some real damage to real people.
There are some valid concerns about where personal responsibility ends and liability begins (legally and ethically), and how AirBnB's service will evolve to address these issues, but there are different ways to discuss these concerns, and discussions here so far have been nothing but poisonous.