Oh wow, this false accusation stuff is happening even more than I thought! (I just commented on a separate post where UK guest had been falsely accused of smoking...just like my friend was in the US a few weeks ago).
It appears about 2-3 years ago hosts were unhappy with how Airbnb handled their complaints -- taking the guests' word over the hosts' more often than not.
It appears now Airbnb has overcorrected, and guests are paying the price!
A host profiled my friend and used a photo of purple shampoo residue to "prove" my friend had dyed her hair in the tub.
Fun fact: my friends's hair was and is blond. The purple shampoo makes the blond less yellow. That's it. There is not even any purple hair involved in this whole dumb story!
The host also falsely accused my friend of smoking. Fun fact: My friend can't even be around somebody smoking without literally having a seizure!
Airbnb's response so far is "sorry, we believe the host" even though my friend can show medical proof she is not a smoker.
Sounds like some hosts or cleaning companies are profiling guests with kids just like other hosts are profiling guests based on other factors to support their false accusations.
It makes sense -- tailor the accusation to the kinds of complaints Airbnb would "expect" from that guest based on their profile/reservation.