Can the interior (the content, the scent, etc.) of one person's car be the same as that of another's car?

What are the chances of that being the case, and the fob working on the wrong car? Some people are getting into other people’s cars and driving away. Even if the person driving away just rented the car. What are the chances of the wrong car has no personal (or not so personal) items in the passenger sea, t or dash board, or other places?