This is a lot of assertions of fact, almost all of which either don't match my understanding of the situation, or are things that I don't understand how could be known so definitively.
Also, this is speaking in a way that might sound like some referencing some legal standard, or being an exhaustive or overwhelming philosophical analysis. But, even were these assertions true, I suggest that the argument is missing the issue raised.
Specifically, the image used as an example of 'ok' in one part of the Imgur policy document arguably hits all over the specific language of the harassment section of the same document. See quoted parts.
It seems an incredibly poor example to choose, and it's arguably a renewed instance of harassing image posting by their own definitions.