Place this on template documentations, not the templates themselves! Furthermore, do not place this when the template is missing TemplateData. Place it only when TemplateData exists but it is of poor quality.
Place this template in the template documentation to mark templates with crude TemplateData. Do not place this when no TemplateData exists, place it only when the TemplateData that exists is of poor quality and needs improvement. You can add this where you yourself added TemplateData that needs significant cleanup, or when you encounter TemplateData that needs significant cleanup.