Note

game/modules/tome/class/NPC.lua

@@ -220,7 +220,7 @@ function _M:seen_by(who)
 	if self:hasEffect(self.EFF_VAULTED) and who and game.party:hasMember(who) then self:removeEffect(self.EFF_VAULTED, true, true) end
 
 	-- Check if we can pass target
-	if self.dont_pass_target then return end
+	if self.dont_pass_target then return end -- This means that ghosts can alert other NPC's but not vice versa ;)
 	if not who.ai_target then return end
 	if not who.ai_target.actor then return end
 	if not who.ai_target.actor.x then return end