Art, in all it's forms, is a medium of self-expression, and as such I think you should have the right to post any image, no matter how provocative. While I feel that the image you described is perhaps a bit over the top, I still say post it. Just be prepared to dive for cover. Maybe the 'Rosity brass should add another tick-box for posting images. We already have "violence" and "nudity". Why not "blatantly in bad taste"? ;)