As far as calling it cannibalism is concerned I don't agree. You must be against organ donation and blood donation too if you are to call yourself intellectually honest.
Nice try, but no soup for you. Organ 'donation' is a consent arrangement; in the case of a living donor, the alive individual consents; in the case of a deceased donor, the person is no longer alive and the family decides or the once alive individual's donor card decides the issue. You favor taking organs from alive humans?