So it seems to be some sort of linguistic peculiarity in that specific group. MMO players tend to be relatively sheltered, so it could have formed organically? This makes sense to me. It’s unlikely, but it sounds better than “let’s make shit up and fuck with him”.
I don’t know how I would handle this. Most people I play with online are even deeper in the spectrum than I am. Do me a favour, the next time they have an conversation, just throw a single punctuation in the chat and see how they react.