As opposed to cannibalism
which is a taboo
against eating one's own species
, "sennibalism" (as defined in a slim few sources, like the Furre! RPG
) is eating of any sentient
being, and is generally frowned upon
. So perhaps one day it would be against social mores
to eat Everything
, if some theories
come to be true.
It would be difficult to survive in Roguelike games if sennibalism, rather than cannibalism, carried a penalty--but given that some people can ascend with a truly vegan Monk character in Nethack, it might not be so bad.