I was asked this question when renting last year at a Thrifty (I think) in Kearney, NE (EAR). I was renting one-way with a return at Grand Island, NE (GRI). I just figured they asked the question because I had never rented with them before. I can't imagine where I could take the car that they would object to, since Kearney is already in the middle of nowhere.