NPC Entering House to Bake White Cakes

I have sims in my household that are celebrities, so paparazzi outside their house is expected. However, the NPC paparazzi keep entering my house, without being invited in, and baking several white cakes. There ends up being like 10 white cakes fully made or the ingredients around my kitchen/dining room. I cannot drag these cakes to the bin, I have to make my sim clean this up. Once it's clean, the paparazzi enter and make more! I have been deleting the paparazzi from the game, but more NPCs are generated and do the same thing. To this, I had a social event, birthday party, and my guests who are not selected to be the caterer, also bake several white cakes.