Adds Destroys.

code/game/objects/effects/bump_teleporter.dm

@@ -17,7 +17,7 @@ var/list/obj/effect/bump_teleporter/BUMP_TELEPORTERS = list()
 
 /obj/effect/bump_teleporter/Destroy()
 	BUMP_TELEPORTERS -= src
-	..()
+	return ..()
 
 /obj/effect/bump_teleporter/Bumped(atom/user)
 	if(!ismob(user))

code/game/objects/effects/decals/Cleanable/humans.dm

@@ -24,7 +24,7 @@ var/global/list/image/splatter_cache=list()
 /obj/effect/decal/cleanable/blood/Destroy()
 	for(var/datum/disease/D in viruses)
 		D.cure(0)
-	..()
+	return ..()
 
 /obj/effect/decal/cleanable/blood/New()
 	..()

code/game/objects/effects/effect_system.dm

@@ -23,8 +23,7 @@ would spawn and follow the beaker, even if it is carried or thrown.
 /obj/effect/Destroy()
 	if(reagents)
 		reagents.delete()
-	PlaceInPool(src)
-	return 1
+	return ..()
 
 /obj/effect/effect/water/Move(turf/newloc)
 	//var/turf/T = src.loc
@@ -140,8 +139,7 @@ steam.start() -- spawns the effect
 	var/turf/T = src.loc
 	if (istype(T, /turf))
 		T.hotspot_expose(1000,100)
-	..()
-	return
+	return ..()
 
 /obj/effect/effect/sparks/Move()
 	..()

code/game/objects/effects/landmarks.dm

@@ -83,7 +83,7 @@
 
 /obj/effect/landmark/Destroy()
 	landmarks_list -= src
-	..()
+	return ..()
 
 /obj/effect/landmark/start
 	name = "start"
@@ -103,7 +103,8 @@
 
 /obj/effect/landmark/start/ninja/New()
 	..()
-	ninjastart += src
+	ninjastart += loc
+	qdel(src)
 
 //Costume spawner landmarks
 

code/game/objects/effects/overlays.dm

@@ -3,10 +3,6 @@
 	unacidable = 1
 	var/i_attached//Added for possible image attachments to objects. For hallucinations and the like.
 
-/obj/effect/overlay/Destroy()
-	PlaceInPool(src)
-	return 1 //cancels the GCing
-
 /obj/effect/overlay/beam//Not actually a projectile, just an effect.
 	name="beam"
 	icon='icons/effects/beam.dmi'

code/game/objects/effects/spiders.dm

@@ -209,4 +209,4 @@
 	src.visible_message("\red \the [src] splits open.")
 	for(var/atom/movable/A in contents)
 		A.loc = src.loc
-	..()
+	return ..()