Spirit realm ghosts can't observe (#90556)

code/modules/mob/dead/observer/observer.dm

@@ -920,7 +920,7 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 	set name = "Observe"
 	set category = "Ghost"
 
-	if(!isobserver(usr)) //Make sure they're an observer!
+	if(!isobserver(usr) || HAS_TRAIT(src, TRAIT_NO_OBSERVE)) //Make sure they're an observer!
 		return
 
 	reset_perspective(null)
@@ -959,6 +959,9 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 			this is a bug (and a past exploit) and should be investigated.")
 		return
 
+	if(HAS_TRAIT(src, TRAIT_NO_OBSERVE))
+		return
+
 	//Istype so we filter out points of interest that are not mobs
 	if(client && mob_eye && istype(mob_eye))
 		client.set_eye(mob_eye)

code/modules/mob/dead/observer/orbit.dm

@@ -147,6 +147,7 @@ GLOBAL_DATUM_INIT(orbit_menu, /datum/orbit_menu, new)
 		"ghosts" = ghosts,
 		"misc" = misc,
 		"npcs" = npcs,
+		"can_observe" = !HAS_TRAIT(user, TRAIT_NO_OBSERVE),
 	)