DO NOT USE FACEBOOK MESSENGER for group messages
Unless it's OK for your EVERY message to be published to the whole world, Facebook Messenger must not be used for any group conversations. I am referring to Facebook chat groups, not Facebook groups. There are basically no options to control Facebook chat groups. Any member of the conversation can add any person, Friend or not, to an existing conversation! So, even if there were no ill intentions, an accidental addition of someone else means TOTAL COMPLETE leakage. Even if you Remove that unintended person immediately, that person can view the WHOLE conversation, every message , since the group was created. There is no way to stop this . In the first place, while you can easily Add a person to a conversation from www.messenger.com, there is no way to Remove him or her on this same site. You have to do it from the Messenger app from the phone or facebook.com. Removal of a participant merely stops new messages from going to that person. He or see can still continue to se...