The only other sims on the lot is his wife, who doesn't seem to have any of the pranking traits, so I am puzzled. As far as I know, it will not interfere with game play. But if it is an illness, will it kill the sims? The life and death thing, to tell the truth, drives me nuts. It is one thing I wish I could turn off, as I will leave my game playing to take care of my son or something household related IRL, come back and find the death notice occasionally. If it is a household I am REALLY into at the moment, of course you lose what progress the game made. I like coming back to the game after an hour of it alone to see how things have gone. But they are near water and do not have that swimming skill, 😬 well sims just can't resist a swimming pool! But I digress. An unknown killing illness will ruin that for me. If it doesn't kill them, then I am all in! But the last couple of additions to the game (L&D, Enchanted) have added things I am not playing with yet and am not sure of the dangers of the packs to my sims.