In List Manager, have a reference to where the list is linked to: that may include another list or an extraction. This would give confidence when amending an existing list or deleting a list.
I took a stab at a query to determine simply what lists directly referred to a given list. Ugly! The dependency is based on a string of comma separated numbers in parenthesis stored in T_LIST_EXTRACTION. Just generating a table of integer list_no to integer list_no of the dependent and dependency takes over four minutes to run on my database.