I like their furiousness. But sadness is for pussies and people in my family are executed for that sort of nonsense. But furiousness? We NEVER FORGIVE!
So make grieving sims become furious at the Grim Reaper. Or at roaches. Or at a random adult in the household. "He wouldn't have died if it weren't for YOU!"Then Grimmie comes to take them for being disrespectful, the roaches attack or the offending sim kills them for the injustice of it all. Sounds good to me!
My own wish is that there would be a big, invisible (to the sims) hand that the sims are aware of to smack them across a room when they do something stupid. A learning behavior might/might not be part of the scheme so that they'd eventually stop that behavior and find some other stupid thing to do. For example: Sim makes lobster thermidor when they're nearly broke and their hunger isn't very low. Smack! Eventually sim learns to make the lobster only when extremely hungry and can afford it. Either that or we could have fun smacking them around!