For what it's worth I think this kind of thing is a good influence.
Michael Jackson fanatics need to make peace with the fact that some people hate Michael Jackson. And learn to live with it. It may hurt them to see him bashed, but in the long run it's a good thing, they get adjusted to the present reality.
"That's sick" is an appropriate response to shock material, "zomg take that down because I can't bear to look at it" is not.