Recent reports tell of an increasing amount of disappearing people in the areas around the Silverpine Forest, Kul Tiras, Crestfall and Tol'Barad. It seems as if the amount of disappearings increase the closer one gets to Gilneas.
Gilneas is a strange kingdom as it built a large wall which has been closed for years. There must be something within those walls that can explain the amount of disappearings.