TIL that you can enable or disable read receipt for each conversation thread or group chat. I don't have to stay ninja to all my friends, just to annoying ones. Just click the "I" in the upper left corner of the chat room and scroll to the bottom to see this option.

Read receipt yung nakikita mo kung nabasa na nila message mo at the same time nakikita nila kung nabasa mo na message nila. Eto rin yung 3 bouncing balls while you/they are typing. Click image for larger version.  Name: Screenshot_20240307_135547_Messenger.jpg  Views: 0  Size: 35.6 KB  ID: 45695