Do you step out of the road when someone tells you a car is coming, but when you look and listen you cannot detect that one is there? Probably not. You may prepare to step out of the road, but not actually do that yet. Similarly, if you hear a car coming, stop and look everywhere but do not see one, do you still step out of the road? If this happens to me, I continue crossing as normal, writing off what I heard as my imagination falsely interpreting incoming data.
That's where I am in your scenario. But I can imagine other people avoiding road crossings now and in the future because of what they thought they heard, even though their other senses disprove their initial conclusion (or sometimes they might not even use their other senses). I believe that's called paranoia, or related to it.
Remember, what you see is not necessarily what other people see (or "hear", as in your analogy). Other people may not react the same way you do because they do not see coming what you see coming. Nobody is the recognized "speaker of the truth" no matter what they think of themselves and their predictions. People are always going to take what they see for themselves as more reliable than what somebody else tells them they should be seeing, except maybe for the really weak minds that exist in cults and such.