[iamacyborg]

I think your latter point is a bit different to the topic at hand.

Cannibalism isn’t widely seen as distasteful because of the suffering involved, but because you're eating people.

Maybe a better question would be around eating dog, dolphin or to a lesser extent, horse meat.

[rhn_mk1]

Or the inverse: turning the brain dead into animal feed or fertilizer.

Closer to home: donating them to research/organ donation before they formally die.