Mourning sims

So I think the “mourning” system is goofy and kind of inappropriate. This is what just recently happened is a vampire, that neither of my sims knew, was breaking in to suck their plasma while they were asleep. So I used MCCC to kill the vampire sim “death by sun”; this is all happening while both sims are asleep. Reaper comes and takes dead vampire’s soul, end of story. They didn’t witness the death or any of the events after, so why in the-sim-name are they mourning this plasma-suckers death, and for two days?! What even bothers me more is everybody is sending them condolence texts because of the death of a “LOVED ONE”! I did them a favor, they should be thankful. And this isn’t the first time this has happened.