There is no reason why you would see a black silhouette at any time. You should be able to see outside the event horizon in all directions. In fact, in three dimensions you should never see a black silhouette, as rays from objects behind are curved around in front. You should see objects behind the black hole, therefore eliminating the black silhouette entirely.

Also, from their description quote "The black hole appears to "repel" the image radially, which in turn stretches the image transversely. Parts of the image nearer the black hole are repelled more, so the image appears compressed radially." If the black hole were extremely large, say the size of the universe, then by their description I would expect to see the images of distant objects receding from me. I would interpret this as a measure of the average collapsing constant of the universe. As all matter in the universe clumps, or rather collapses, toward the nearest black hole, we exist in limbo, between the larger cosmic event horizon and the crushing entropy-reducing crucible at the center of our own galaxy, from which nothing can escape, not even HEAT.

I'm also not convinced that a singularity exists inside a black hole - matter is merely bound inside the imaginary event horizon radius, and the conditions that exist at the event horizon IMO are entirely absent inside it, other than mass, density and temperature. IMO nuclear physics, plasma physics, and the ideal gas laws are what determine the conditions inside a black hole, not some imaginary asymtotic singularity. If physicists want to make advances, they have to get past this stuff and think realistically.

I totally disagree with this model.