This is the worst thing ever. I have coworkers who literally cannot string three words together without making a grammar mistake, but recently they've been texting me with more-than-perfect grammar and a vast vocabulary.

These people are trying to fool everyone else making them think they are smarter/more educated than they actually are. They aren't fooling me, I've seen their real writing, I know it's not actually their text and thoughts, it really disgusts me.