A crawl on the TV screen is usu. ALL UPPERCASE ? ---- to make them less annoying, right?

A crawl on the TV screen is usu. ALL  UPPERCASE ?
               -------- to make them less annoying, right?
                       Mixed case Text would be harder to ignore ???
https://en.wikipedia.org/wiki/News_ticker#/media/File:USA_TV_News_Simulation_1.jpg
https://en.wikipedia.org/wiki/News_ticker
            A news ticker (sometimes called a crawler, crawl, slide, zipper, ticker tape, or chyron) is a horizontal or vertical (depending on a language's writing system) text-based display either in the form of a graphic that typically resides in the lower third of the screen space on a television station or network (usually during news programming) or as a long, thin scoreboard-style display seen around the facades of some offices or public buildings dedicated to presenting headlines or minor pieces of news.
            It is an evolution of the ticker tape, a continuous paper print-out of stock quotes from a printing telegraph which was mainly used in stock exchanges before the advance of technology in the 1960s.
----------- the 1st Sentence is TOO long...
              >>> or vertical (depending on a language's writing system)
          That's  really  stupid.  ------ reminds me of PTD.