Hi Ernst,
I don't have an answer for you regarding declining strange requests - though it may be worth reaching out to Airbnb customer service to see if they can help.
I do have a question for you about accepting requests for photoshoots though. What do you typically charge? Your nightly rate or something else? Do you have a contract for this kind of use of your place?
I just got a photoshoot request, and I am trying to decide how to proceed.
Any help it appreciated! Thanks,
Sarah