@Caroline,
I watched a documentary on Nat Geo the other day that showed some of the human history of cannibalism. 70% of humans have an enzyme chain that protects against Kuru type diseases. Kuru being a disease called the laughing death, documented in Papua New Guinnea, only brought about by the consumption of human flesh. The doctors who found this enzyme are arguing that at some point in human evolution cannibalism must have been widespread for the enzyme to have been so strongly selected.
Aside from that Cannibalism is and was a very effective psychological tool in war time and homeland protection. It is still practiced in the former country of Congo by factions in that civil war who use it as intimidation. In some polynesian languages the word for enemy is (Long Pig), because going to war island to island in outrigger canoes meant carrying very little food, so eating the enemy as you conquered them was not so far fetched. and the historical and pre-historical doumentation goes on with different types of ceremonial and funerary cannibalism etc...
In my opinion, no it is not wrong inherently, it causes no harm to anyone, the dead don't feel pain. I would rather not, however, take the chance that I'm in the 30% without the cannibal protective enzyme. The laughing death doesn't sound very funny.
Cheers,
Russ