When you have it create the child incidents you could specify the response level on the window. Then you could either use a lower priority response level that wouldn't email the enterprise, or you could create a special response level that wouldn't have any actions.
Hope you are well.
The customer wants to use response levels when running statistics against Incidents. For example, show me all incidents with a P1 Response level, so downgrading the response level unfortunately tampers with this. At the moment, I have it as you suggested: Create Child or add affected user uses a a lower priority response level.
Thanks for the response though