About 1/3 of Americans have a tattoo [1]. Of the people without tattoos 66% say seeing a tattoo on someone gives them neither a negative or positive opinion of the person.
A tattoo on the buttocks will not cause skin cancer on the face. (There is a small association between tattoos and skin cancer but that is skin cancers at the tattoo sight, and it is not so much that they cause the cancer but rather make it harder to notice the cancer so it tends to be farther along before detected).
So I don't see how it could not be controversial to cut of Medicare to someone over something that a solid majority don't care about and that almost certainly has nothing whatsoever to do with their skin cancer.
