Caps Lock Day first came to pass in the year 2000, when Derek Arnold of Iowa decided that he, like so many other internet users, had simply had enough of people using all caps to emphasise themselves on the web. So he created Caps Lock Day in the interest of poking fun at people who use this abomination of a typing style, and to finally bring some sanity to the net. There are some protocols that make it appropriate to post in all Caps, such as when posting as part of a weather monitoring network. In this rare and perhaps singular case, all caps are how you indicate that something is in fact of importance, and with its collection of acronyms and shorthand makes sure its clear. PLEASE DON'T. Any other typing styles that get on your nerves? I'd suggest multiple exclamation marks!!!!!
It's a day when you can shout really loud on your keyboard but nobody can actually hear you and they look at it and think pffft
These days its just another key with a scan code, sometimes a light. In the old days it used to be a proper lock to hold down the shift mechanism which moved the guts of the typewriter up and down. I used to have an electric typewriter where that was powered. It was somewhat satisfying just brushing the shift key and feeling the table thump, and when the carriage returned with the platen and roller, the table would rock from side to side .