I might add that because you haven't heard of a Nigerian cab drive taking a fare to the wrong place doesn't mean anything. We are talking about probability. Is it less or more likely that a person who doesn't speak English will err more than a person who does speak English in a majority English speaking country? It is more likely that the Nigerian will err more than an English speaker in NYC. It is ultimately a math problem. And I might add that, padding the fare may be bad but that isn't really a risks. It really is just an assumption of something that will happen to anyone who doesn't know NYC and doesn't know where to go themselves.