I've seen this point and agree with it, but I really have to wonder: if the app was just called "Documents" or "My Docs" and had a professional-looking icon, would a significant number of people really have given it a second look anyway?
People are way more likely to accept that than if the dialog had been "hhhhhhhhhhh@mailinator.com would like to 'Read, send, delete, and mange your email'".