Many of my guests are on road trips it seems, perhaps I should keep track of their reason for staying with me, I usually ask what brings them my way but not always, sometimes they are chatty sometimes not. I mainly use IB.
I have certainly had people heading to the west coast, most unlikely they would attending an event near me that would fall foul of the AirBnB policy.
I did have a quick look on the SPLC site for my State, there are not many groups mentioned, some I have never heard of and seem to be tiny, also groups that would fall foul of the ABB policy that are not mentioned as far as I could see.
When people sign up for AirBnB they have to agree to AirBnB policies so seems to be double dipping to ask them again.
David