The Center for Body Donations in Paris neglected many donated corpses and allowed them to be eaten by rats.

Why do people make such a fuss about what will happen to their dead bodies? If those corpses would have been useful to science, it was a sad loss to science that they were instead wasted on feeding rats. A wasteful failure, but not a heinous crime. It can't have any effect on the people whose bodies they formerly were. Those people are dead.

Someday one of those bodies might be mine, since I have offered my future dead body to research. (That is the most useful thing I can think of to do with it.) My opinion about wasting those donations is the same regardless of whether the body in question is mine or another's.