Its very simple, us Pilots, like to sound like the sky gods we are, the radio being the ultimate place to broadcast to our peers at what mighty pah-lots we really are. A VFR pilot calls ABS 15 miles east inbound etc. He then gets an instrument and starts adding flash words in like DME and radial to let everyone now of the MECIR now stuck in the prized logbook. Trends start to appear in locations with new jazzy ways of letting everyone now what a brilliant operator you are and it spreads like cancer across the country.
A wise man once told me KISS................ im sure you all know what it stands for
Required calls are in Jeps and Aip. Use 'em