Welcome to the Nexus!
The Saggitarian Nexus is a hearty band of fake people who spend most of their time wandering around in the wilderness, occasionally stopping to perpetrate horrible violence on whoever happens to be nearby. They have proven especially adept at stealing sailing vessels, throwing people off cliffs, and ruining social situations.
If you happen to encounter the Nexus, immediately drop whatever you may be carrying, smile gently, and back away slowly. If you feel you are out of range of any immediate threat, you may attempt to communicate with them to assure them that you have no knowledge of the surrounding area, and are not selling anything.
Follow the Nexus in their minute to minute horrors at their blog.