That wouldn't logically happen. When someone dies, even if you don't like the person, you feel sorrow because of the feeling of death and fragility. Granted they would lie and be all like: I always loved you! But they would still feel the effect of someone's death. I never really liked my uncle, only met him a couple times, but I cried for so long at his funeral because it reminded me of how short human life is. Let the living mourn the dead.