If children were banned from the stage, and related industries, it would provide a significant boost to the fortunes of the midget community, who would inevitably strike to fill the ensuing power vacuum.
Due to the widespread shortage of little people, you never see as many as you used to do you, any child ban would have to be phased in. Perhaps the boffins in the lab, given enough time, would come up with some kind of dwarfism drug, or we could just force children to smoke from an early age in order to stunt their growth.
In conclusion - confusing.