It's not even that simple a misunderstanding.
As I mentioned above, they are referring to this:
and here is the Kaguya image from the same spot, which I stitched together from 9 separate tiles:
This is a very good example of what happens when people try to determine what something might be from a high contrast, blunt (out of focus) photograph with its attendant loss of detail and tonal range. At the left hand end of your red marked area, there is a part that looks for all the world like a round, cylindrical pipe-like object passing though the walls and the top end of the crater. The apparition is reinforced by random shadows and lighting to the right that happen to roughly line up with it. But when you find a sharp photograph with good contrast, the apparition is lost and you can see what it really is.
Probably the most famous example of this is the Cydonia "Face on Mars"
The image on the left is the original Viking photo taken in 1976. Its blurry and not in good focus, and it is covered with image data errors (the black dots). The two images on the right were taken with the Mars Orbital Camera in 1998 (they are actually the same image but one is tonally inverted, i.e. its a negative. When you see the sharp, lower contract image, the "face" apparition disappears, yet almost 20 years later, there are still nutjobs who insist the face exists and keep going back the the old Viking photo as evidence.
Here is an example I made up...
Of course, I know what it actually is, and I also have an idea what people might think it looks like, but I am not going reveal that because I don't want to put my idea into people's heads, and I would ask that others don't post what they think it looks like for 24 hours. All will then be revealed!
