I'm expressing no opinion here about what qualifies as art (or not) or what is legal (or not). But it is the type of content that, taken together, could cause a blog to be deleted for TOS violations.
It seems to me that if you want a free place to publish photos that appear to be necrophilia, anal fisting, and bestiality, well, maybe pay $5 a month to host your site somewhere yourself? I suspect that any free blog hosting service is not the place for you.