Well…I can see some issues with the Anthropological and Paleontological collections, because use to be sensitive in many occasions. In Argentina we have a really restricted law about those kind of collections. Also, some museums, like La Plata Museum (Argentina) has a restitution police for human remains who have been proven living offspring. But, even with all this, I strongly believe that all categories should be included, and also the grey categories mention by @elyw