Don't let Shlup kick graves anymore. The ghosts will try and kill her if she does, as they did once already. Just put a fence around the graves

xD levitating bowling alley. Also Jessweeee live on inside the oven it seems like.
Next time you get an unexpected visit from the grim reaper, you should try and have someone save the Sim from death

Finally since Milf is a knowledge Sim, he Wants to see the ghosts again. Everyone else doesn't xD