That is one way of looking at it I suppose.

I look at it like detecting a black hole. You can observe the absence of light in a region of space (because the black hole bends the light that goes around and consumes the light that enters) and from that theorise the existence of a black hole. You never observe the black hole.

So although I have not seen any video or have any evidence it exists, I have seen that his name is never used. and one way to explain it is the theory I present. It is pure theory, but it fits the distain he gets. As far as I know there has not been an explanation of why he is never named.