Knowing Where to Put Information
You cannot assume that users will know where their information should be hosted in your SharePoint environment. Without communicating a corporate-wide set of expectations about where information goes in SharePoint, users will be left to make the decision on their own and you’ll find that each one will have a different idea as to where their own information should reside.
If your organization can’t bring itself to make core governance decisions, then conflict is bound to erupt based on the lack of direction for your SharePoint deployment. Because users will decide where their information goes, they will necessarily end up negotiating where they will collaborate within SharePoint.
Someone in your organization needs to make some high-level decisions about where information will go and who will manage it. These decisions need to be communicated and then enforced if you plan on avoiding conflict surrounding where information goes in SharePoint.