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

oh and please do not me forget molding clay...need I say more

Yep, the Gaming Rig, had it in my first household, then into the inventory it went, never to make a reappearance!
Recently - a composting toilet! An inspector can stare and make as many notes as they like, I do want to think about bursting into flames in the bathroom!

From gameplay perspective it is washing machines of all kinds. Laundry is just never ever done and not due to lack of trying. As for other items - well, molding clay is a given, but otherwise nothing much. Even the gaming rig has it's place in my home, for it keeps guests in one place. I'd say that there is a variant of this for me, though - there is one item that is present in my home, but always stays OFF. Yep, the musical system.

Stereos because the endless dancing drives me insane. They don't even dance like normal people would. It's to weird for me. I give them the Lin-z thing instead because they don't seem to use it automatically which means I decide when they can dance. :D

The bar because my sims will always make drinks when I didn't want them to

The lump of clay like you said. The doll house because the kids CONSTANTLY ask the parents to play. Toys in general, kids will do anything to play with them.

Toddler high chairs.

After I read about the flaming composting toilet I put mine in the garden. Satisfies the inspector and my Sims never use it.

High chairs.

The only time I've ever had a toddler removed by social services, was starved because the parents wouldn't get it together and one kept taking the kid out while the other was trying to feed them. Even in a one parent house hold I never bother anymore either. More often than not the kid will just throw the food on the floor anyways. Just let them eat off a plate on the floor like a dog, that way they actually finish their meal AND they don't make a mess.

I'm also against high chairs. I'm not sure if there's anything else I actively avoid - maybe cow plants and money trees.

High chairs