To test: 1. Set EnableBorrowerFiles to "Do" 2. Add a file for a patron 3. Try to delete that patron though batch deletion 4. No indication is given that a file is present and the patron is deleted.
This feels like it should be configurable. Many libraries use patron files to store things like signed library card applications or equipment usage agreements, so many/most of their patrons have files and this restriction would be a burden.