Eh, not a big deal for me unless its spanning the entire chat window. I do it a lot, it's just kinda a.... 'typing style', I guess? Not sure how best to explain it. Just a little quirk I've picked up from certain websites I go to as well as people I text. There's really a lot of different tones that are used from website-to-website and ways of typing, and this is just the one a lot of people have used/liked most. Some don't, too, I think both ways are fine.
It's just more informal, I only use it around people when I'm more relaxed, so I don't use it as much in Feralheart as I would messaging a friend on Discord. It's not really an attention-issue thing, just a way to emphasize parts of a sentence in a more dramatic way, I guess?