What happens if an observer tries to publicly chat?
Since player chat shows the player's display name, what happens when an observer publicly chats? Does it look like whoever they were observing was chatting?
Please review any and all PUBLIC repositories, groups and associate files. These allow anyone on the Internet to access without authentication. Repository and group owners are responsible for their content and permission settings. Go to your project(s), click on Settings > General and expand the "Visibility, project features, permissions" to change this setting.