Yesterday, while driving along Canal Street in lower Manhattan, I noticed that a large number of store names were displayed in all capital letters. Not bad. Some, however, were in script typefaces, which made them extremely difficult to read. Here is one example, plus the name of a very famous person. See my point?
Here is an easier-to-read version.
When I was teaching an adult-education class on the use of type, I presented a slide with the names of all of the students, set in all caps, in a script font. Many of them had difficulty recognizing their own names.
Even if you use all caps in a readable font, please do so sparingly. If emphasis is desired, using bold, italics, or underlining might be better.