Before deciding on how your shop sign, book cover or even a newspaper is going to look, you should definitely reexamine the final draft. From these bad design examples, though, you can see, that they were not revised. Or were left as they are as some evil joke to the customer. If you do not desire to be left with doors that only open for a Jedi, a Minion shampoo bottle crying bloody tears, or a street sign that's utterly indecipherable - better not mess with the designer.