What item(s) is banned from your sims home?

Right now bookcases! My sims have lost their minds with them. In one sim hour my sims dragged out every book in the bookcase and strung them all through the house. I thought it was a fluke so I had one of the children clean up all the books and it happened again almost immediately. So I switched households to see what would happen and every household with a bookcase that I visited had the same thing happen! Until the insane book frenzy is finished, my sims shall only be allowed to visit the bookcase with special permission from the locked door room (The one where the computer resides for a similar "Every-sim-wants-it-all-the-time" reason.)

**Also, I've banned one of my sim households family members from coming over. I gave him a key to the residence and now he comes over and makes white cakes all night long. At one point I had 23 white cakes...