Is it a thing to italicize random words in posts now, or is my browser acting weird?
Where did you see this?
In looking for examples it seems this is limited to the same couple of posters and nowhere else, so nevermind.
I like to emphasize certain words when I post, but I tend to use CAPS. The emphasis, IMHO, helps with the message. Italics on an iPhone is above my pay grade.
There’s an I button at the top of the message editor or you can just type underscores at the beginning and end.