I think many times people who prefer morbid or shocking humor think others are criticizing the style of humor when in fact many times it's simply not funny. Shocking does not equal funny. You actually have to have a joke in there somewhere. Then we hear something like, "Oh, you just don't get my humor". Uh, no.
It reminds me of people who feel they didn't get a job because of their race/religion/gender/etc, when in fact they just aren't qualified.