Hi Alix, Yes this would definitely be a concern to me.
I have a policy, I do not rent to locals, unless they can give me a cast iron reason why they need to use my property instead of their own.
In many instances like this you will find the 'guest' turns out to be the secretary who is having a bit of time on the side with the boss....they are not going to jump state borders to do what they are going to do....and in general, will be more concerned about themselves than your lovely property!
They will not be looking for a home away from home!
I would get onto Airbnb and explain that you have reason to feel this guest is going to break your house rules and you do not feel comfortable proceeding with the reservation. Don't cancel it yourself, you will be penalised if you do....get Airbnb to cancel it!
This is definitely not a reservation I would proceed with!
Cheers........Rob