I don't have any experience with GCE but I do have a lot of experience with AWS. What does an email id have to do with your cloud resources? "We now don't delete any email ids" implies you are worried about the same happening again. This makes me wonder why you don't confidently know what an ID is associated with so when you delete you are confident about not breaking anything else.
I think it could be viewed in a different light. It provides a real sense of control over resources (which should be well documented in the first place). If there are rogue resources and objects being utlized unauthorized in an organization it makes it short work to eliminate such things.
