I live in “the best neighborhood” in my city and no reasonable person would ever imagine that anything sketchy is going on anywhere nearby but every once in a while I get a racist and I know who they are because they ask me about my neighbors. I wish I could make a house rule that says, “if you ask me about my neighbors, you will be asked to leave immediately”. When a guest says, “how are your neighbors around here?”, the response I want to give (and stay-tuned, because some day I might) is “the African American family next door is awesome so you should probably leave because I don’t want you making them uncomfortable”.
I just finished up with a case with Airbnb for a couple of guests that this was an issue with and they were terribly insistent with their racist issue and left after one night. Fortunately I had already called it in to Airbnb the first night because I could tell they were going be a problem. Unfortunately, the legal department/anti-discrimination dept contacted them right away the next day, but after they had already left at least (but, geez, since when does Airbnb do anything that quickly?). This caused a, fortunately distant and on the message system, blow-up with these guests who were now demanding a refund. Also, fortunately, guests were so stupid as to threaten giving me a negative review because I refused to refund them so that review is DOA.