"My assumption is that I can't deactivate [yellow-faced "emojis] in other people's posts that appear on my screen."
[Emphasis subsequently added for clarity.]
I am only interested in what's on my screen. As far as I'm concerned, you, and anybody else, can include dozens of yellow faces in every post you, or they, submit. What I was inquiring about was the possibility of them being converted into punctuation mark symbols when they appear on my screen.
NB: The punctuation mark symbols I use are automatically converted into yellow faces when I post. (Not that I ever requested or explicitly agreed to this feature. It came as a total surprise to me.) If automatic conversion to yellow faces is possible on the way out, surely it is not totally inconceivable that yellow faces could be automatically converted into punctuation mark symbols on the way in. Then we could all be happy: You could include your yellow faces, everybody else could see them if they wanted to, and I wouldn't have to.
By the way: über das Ziel hinausschießen
1. automatische Genderkorrektur für alle Beiträge
Where did I write anything about gendered language?
2. Schalter für alte/neue Rechtschreibung
Where did I write anything about changing other people's spelling preferences?
Over and out.