Interestingly, this hits upon a really central question that plagues the majority of art movements. In order to gain acceptance as legitimate art, a movement becomes part of the establishment. We can see this effect most easily in the acceptance of punk as an acceptable genre of music.
So the question becomes, is acceptance a goal for Dark Art, or a thing to be challenged? For me, I see Dark Art as an evolutionary, rather than revolutionary movement, and we should be seeking to widen the public recognition of the beauty and value of the work.
In terms of artists staying true to their ideas/vision (acting as a kind of psychological or spiritual conduit) I am curious about whether this should be considered a component or goal of Dark Art as a movement? I have a specific interest in this kind of work, due to my interests in automatic and paraedolic processes, but how do we differentiate the Surreal from the Dark?