If I’m not mistaken, any properly prepared meat (muscle tissue) should be fine. Most disorders caused by cannibalism happen when consuming brain matter, which, at least for the most part, humans largely don’t eat the brains of any animal…
I get why people are opposed to it, and I’d never force anyone to eat anything that they didn’t want to. But the fact is, if you only eat the meat/muscle, like we do with other animals, and you prepare it much in the same way through proper handling and cooking, it’s generally not hazardous to your health.
It becomes a problem when you start eating other parts beyond the muscles… Honestly, as long as we’re not breeding humans for meat, and the individual who has expired is okay with their remains being eaten, then I don’t really see any problem with it personally.
I don’t think many, if any, people would consent to their body becoming food for their fellow man after they die, but if they did, I don’t really see a problem with doing it, provided proper food safety is considered (as with any meat).
In general the only time this has happened where people have been pretty okay with the fact that it happened is in cases of extreme desperation, like being trapped on a mountain in freezing cold temperatures after a plane crash, with no food aside from the other (already deceased) passengers… In those cases most of society turns a blind eye saying “they did what they had to do to survive” or some other rationalization.