Has anyone seen this happen in chat yet (I don't use FB chat much)? The example image shows it in a group chat (and the text also says "That way, you always know who got the message, and who didn't.", which semi-implies multiple receivers) - does it also happen with just one-on-one chat or is it possible it only happens in group chat? Doing this in group chat seems at least somewhat less invasive, as each person is less likely to be expected to reply in a group chat (and hence wouldn't be as likely to be interpreted as "ignoring" the sender and might have more common legitimate purposes like, as the example image shows, updating people on meeting times/locations).
Yes, I saw it a day or two ago, in a one-on-one chat. And now I feel bad for not having responded to someone else when I was busy, as they may have received a similar notice.
Facebook messenger on my android phone has been showing me if my messages have been read by the recipient for a while now. They must have enabled it on mobile before they did in the browser
