Well, actually, humans are just meat, like dogs, pigs or cows. I've never had a dog at home, but for a long time I was the only one who took grandma's dachshund out for walks. I liked the dog.. but let's face it. Cows, dogs, pigs and humans are all social animals capable of complex emotions. We eat some of them and consider that OK. Therefore, I think it'd only be honest to admit that eating any of them should be ok, as long as no undue suffering or torture is caused.
IMO, mortuary cannibalism is fine. I plan on donating all my organs in the event of my death, and if someone will have the guts to make stew out of the flesh, more power to him.
Why burn perfectly good protein no one needs anymore?