Speaking of typography and settings blocks of text in all-caps, Lena Groeger wrote a good piece for ProPublica:
Of course, if you’re trying to make something hard to read, then
all caps is the perfect choice. Companies that set safety warnings
in all caps may, intentionally or not, veil important information
Here’s a version of the Surgeon General’s Warning that appears in
Edward Tufte’s masterpiece Visual Explanations. The warning
appears on a cigarette billboard and has been artfully concocted
in ALL CAPS, underlined, and surrounded by a dark black border.