As far as Zorn being hesitant to address the issue of violence or exploitation as it relates to his music, I see it in correspondence with David Lynch's reticence about the ideas behind his films ...

Maybe Joe Coleman or R Crumb would be a better comparisons than David Lynch, because of the severity and extremeness of the imagery, or Pasolini in another set of relations...J.G. Ballard...

Funny, I was just rereading some S. Clay Wilson today. Whew. Other comparisons might include Delany's "Equinox" or "Hogg," a book so vile on its surface that I read it at a bookstore and declined to bring a copy into my home. Wm. Crump