I was under the impression you were talking about post-death cannibalism, or a murder case concerning cannibalism. If someone cut their finger off and gave it to someone to eat, well, as sick as it is, I can't say I'd have anything against it. If a family really has complete authority over a deceased persons body, then I guess it would fall under their requirement to give consent about necrophilia, though I would certainly believe the law would need a mention about it while the person was still alive. Though I'm unsure how that would work.HoneyVision said:snip
Regarding bestiality, it may seem like consent, but some would argue that the animal in question does not understand what they are doing, similar to a pre-pubescent child would not understand what they were doing if they gave an older person their "consent" to do things with them. This could be seen as taking advantage, such as if someone who was completely sober slept with someone who was staggeringly intoxicated with the knowledge that that person was not in their proper state of mind.
And I've seen no arguments concerning making criminal things such as scat and piss fetishes. I've seen plenty write them off as disgusting, and the people who practice them as "sick minded" (to which I again, disagree), but never a call for making them illegal.