This is a very hard this to ask about. I am myself overweight, and struggled my entire life, as has my entire family. It's painful and embarrassing, but when does responsibility come into play?
I have been hosting for a year and made significant investments into new bed frames, mattresses, and I never imagined the size of the couple that arrived to stay at my home today. The online pictures were face only, and it just never occurred to me that I should consider what is about to happen. There is no possibility that these two people will fit on a queen size mattress. I assure anyone reading this . . .this is not even traditionally American morbidly obese, it's really a concern for my furniture and belongings. It wouldn't be respectful to put numerical weights - but even high quality furniture has limits. We are beyond all limits here in size, girth, weight, space. I don't know what my rights are, and growing up being bullied myself, I can't imagine how to handle this. I have well over $1,200 worth of furniture and bedding that could be potentially damaged here.
I also cannot see how they will shower or use the bath and toilet space. I'm completely stressed out about a newly renovated space.
Finally - shouldn't I express this as a part of participation with AirBNB? Privately to guest? Privately to AirBNB? I cannot imagine it in a public review, but they have no other reviews, and they came last minute today saying it was because they had an incident with another host. Of course I'm guessing what it was.
I also can't imagine screening potential future guests about this topic either. I'm just overwhelmed.