Every time I see it I think of those YouTube videos people used to make: Ben Shapiro OWNS feminist with FACTS and LOGIC. Definitely sets the bozo bit.

One could argue that it's just what's old becoming new again. In older English capitalization of words was often used to add emphasis or imply meaning beyond what could be conveyed in a sentence by itself. For instance from the Declaration of Independence: "We hold these truths to be self-evident, that all men are created equal, that they are endowed by their Creator with certain unalienable Rights, that among these are Life, Liberty and the pursuit of Happiness."

I don't actually know why this faded and got gradually replaced by our quite specific rules. It seems like a nice way for an author to be able to express much more meaning in the exact same number of characters.

In "old-school" Internet "netiquette" it used to be considered digital SHOUTING. Nowadays it still is in some circles, but it may just be considered emphasis by some of the younger crowd?

It's a type of emphasis.

I am no Zoomer and use it, so the casual age discrimination is seemingly poor pattern recognition.

Further, I used to run a hefty BNET(SCBW) swarm (to give you a better reference for how much text from online users I have come across) and it's use was common then as well.

The best solution to text bothering you is to tell yourself that giving silly things such power is, also, a silly thing.

The preceding 'also' could be all-capped.

I don't get it though. If you want to create emphasis why not use asterisks?

Ha! HN makes it italic. I forgot that.

It’s against the guidelines because it’s been used for emphasis (with varying degrees of classiness) since before the beginning of the Internet.

El presidente does this a lot. Maybe it’s leaking out.