@Carrie1 I agree - We have been reviewing guests with star ratings, thumbs up and down, but how is it being used? We don't know.
Super Guest might be a little bit too much (and I don't think it is realistic under Airbnb's current business model), but I completely love the idea. Airbnb can even make this to reward excellent guests - bonus benefit, use it for marketing, etc.
For those guests who got low rating/thumbs down, Airbnb can make sure if they know what Airbnb is really about. For example, for guests who didn't clean up after themselves, Airbnb can send them an email, or notify on the website/app and tell them that Airbnb is not a hotel, they need to clean up after themselve - Airbnb has the world best branding/communication experts, I am sure they can figure a good way to deliver the message.