I do not keep balls in general play. I keep them in a bin and we pull them out for a specific activity. That way all the toys available are NOT for throwing. I teach them to not drop or throw. I teach them what I WANT them to do which is lay down the toy into the toy box when returning or take it down to the floor to play with it. I do floor based play so nearly everything is played off the floor.

If the child persisted after training I would have them in their own play yard (six feet by three feet) and fill with all cloth toys. That way they can toss away to their little hearts content and not break anything and no noise.

Throwing, dumping, running house, climbing furniture etc. are all skills kids need to learn. I just don't offer that learning here. They can get their throw on at home. They can dump at home. They can do "run the house" at home. Here I want the safety that comes from no throwing and I want my toys to last for many many generations of kids. I haven't bought toys since 2008 I think. I don't throw away five bucks worth of toys per year. We keep them in great condition in part because I don't allow throwing or dropping of non cloth toys.