I just had guests that were either deceptive or stupid. Not sure which, so I chose the "higher ground". Anyway, she booked for 4 guests, but 8 arrived. My max number is 6 people, so when I tried to change the reservation, I had 2 problems. First it would only allow me to put in for 6 and second, because the stay had technically started, I was completely blocked by airbnb from making the change to the number of guests.
I tried making a request for money, but the amount I calculated she owed me, was different than what she showed me on her phone that she paid airbnb. So we just resolved the issue through a compromise, but honestly I feel cheated out of money I should have gotten, and I have a feeling she has done this before. (she even said that her friends were mad at her for not booking correctly, that they couldn't afford the extra money, and could I give her a break for guests 7 & 8 by not paying for them). Now, I will make ABSOLUTELY SURE that the number that is booked is the number that shows up. Unfortunately, this situation is complicated by the fact that they arrive at different times in different cars. Just glad that we are always on the property when we check in guests, as hosts with just a lockbox, don't really know how many are staying!