Why are so many people triggered by this request? It isn't something extreme outside the scope of the game. We have spooky areas, graveyards, and undead. Getting outdoor tombstones wouldn't be the end or a more spooky housing skin. I would guess though as all seasonal events lean towards the cute. You would have better luck trying to convince for just added housing furniture. In fact I would go so far as to talk to others work on a design and submit it for the next housing contest.