diff --git a/nodes/node_battery_holder.lua b/nodes/node_battery_holder.lua
index 1d5a6c7..c869a0f 100644
--- a/nodes/node_battery_holder.lua
+++ b/nodes/node_battery_holder.lua
@@ -65,7 +65,7 @@ local def = {
 	end,
 
 	-- Allow all items with energy storage to be placed in the inventory
-	allow_metadata_inventory_put = function(_, listname, _, stack)
+	allow_metadata_inventory_put = function(pos, listname, _, stack, player)
 		if listname == "batteries" then
 			if not minetest.global_exists("technic") then
 				return 0
@@ -80,11 +80,13 @@ local def = {
 				-- And specifically if they hold any charge
 				-- Disregard empty batteries, the player should know better
 				if md and md.charge > 0 then
+					if digtron.check_protected_and_record(pos, player) then
+						return 0
+					end
 					return stack:get_count()
 				else
 					return 0
 				end
-
 			else
 				return 0
 			end
@@ -92,6 +94,10 @@ local def = {
 		return 0
 	end,
 
+	allow_metadata_inventory_move = digtron.protected_allow_metadata_inventory_move,
+
+	allow_metadata_inventory_take = digtron.protected_allow_metadata_inventory_take,
+
 
 	can_dig = function(pos)
 		local meta = minetest.get_meta(pos)
diff --git a/nodes/node_builders.lua b/nodes/node_builders.lua
index fa261ab..c6410a4 100644
--- a/nodes/node_builders.lua
+++ b/nodes/node_builders.lua
@@ -259,7 +259,11 @@ minetest.register_node("digtron:builder", {
 		digtron.update_builder_item(pos)
 	end,
 
-	allow_metadata_inventory_put = function(pos, listname, index, stack)
+	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		if digtron.check_protected_and_record(pos, player) then
+			return 0
+		end
+
 		local stack_name = stack:get_name()
 
 		if minetest.get_item_group(stack_name, "digtron") ~= 0 then
@@ -284,10 +288,12 @@ minetest.register_node("digtron:builder", {
 		return 0
 	end,
 
-	allow_metadata_inventory_take = function(pos, listname, index)
-		node_inventory_table.pos = pos
-		local inv = minetest.get_inventory(node_inventory_table)
-		inv:set_stack(listname, index, ItemStack(""))
+	allow_metadata_inventory_take = function(pos, listname, index, _, player)
+		if not digtron.check_protected_and_record(pos, player) then
+			node_inventory_table.pos = pos
+			local inv = minetest.get_inventory(node_inventory_table)
+			inv:set_stack(listname, index, ItemStack(""))
+		end
 		return 0
 	end,
 
diff --git a/nodes/node_controllers.lua b/nodes/node_controllers.lua
index 36e7856..391ce46 100644
--- a/nodes/node_controllers.lua
+++ b/nodes/node_controllers.lua
@@ -237,8 +237,9 @@ minetest.register_node("digtron:auto_controller", {
 		inv:set_size("stop", 1)
 	end,
 
-	allow_metadata_inventory_put = function(pos, listname, index, stack)
-		if minetest.get_item_group(stack:get_name(), "digtron") ~= 0 then
+	allow_metadata_inventory_put = function(pos, listname, index, stack, player)
+		if digtron.check_protected_and_record(pos, player)
+			or minetest.get_item_group(stack:get_name(), "digtron") ~= 0 then
 			return 0 -- pointless setting a Digtron node as a stop block
 		end
 		node_inventory_table.pos = pos
@@ -247,10 +248,12 @@ minetest.register_node("digtron:auto_controller", {
 		return 0
 	end,
 
-	allow_metadata_inventory_take = function(pos, listname, index)
-		node_inventory_table.pos = pos
-		local inv = minetest.get_inventory(node_inventory_table)
-		inv:set_stack(listname, index, ItemStack(""))
+	allow_metadata_inventory_take = function(pos, listname, index, _, player)
+		if not digtron.check_protected_and_record(pos, player) then
+			node_inventory_table.pos = pos
+			local inv = minetest.get_inventory(node_inventory_table)
+			inv:set_stack(listname, index, ItemStack(""))
+		end
 		return 0
 	end,
 
diff --git a/nodes/node_duplicator.lua b/nodes/node_duplicator.lua
index aaca866..9a979d3 100644
--- a/nodes/node_duplicator.lua
+++ b/nodes/node_duplicator.lua
@@ -76,7 +76,11 @@ minetest.register_node("digtron:duplicator", {
 		return inv:is_empty("main")
 	end,
 
-	allow_metadata_inventory_put = function(_, _, _, stack)
+	allow_metadata_inventory_put = function(pos, _, _, stack, player)
+		if digtron.check_protected_and_record(pos, player) then
+			return 0
+		end
+
 		if minetest.get_item_group(stack:get_name(), "digtron") > 0 then
 			return stack:get_count()
 		else
@@ -84,6 +88,10 @@ minetest.register_node("digtron:duplicator", {
 		end
 	end,
 
+	allow_metadata_inventory_move = digtron.protected_allow_metadata_inventory_move,
+
+	allow_metadata_inventory_take = digtron.protected_allow_metadata_inventory_take,
+
 	on_receive_fields = function(pos, _, fields, sender)
 		local player_name = sender:get_player_name()
 		if fields.help then
diff --git a/nodes/node_storage.lua b/nodes/node_storage.lua
index a27ad35..68cd20c 100644
--- a/nodes/node_storage.lua
+++ b/nodes/node_storage.lua
@@ -74,6 +74,12 @@ minetest.register_node("digtron:inventory", set_logger({
 		return inv:is_empty("main")
 	end,
 
+	allow_metadata_inventory_put = digtron.protected_allow_metadata_inventory_put,
+
+	allow_metadata_inventory_move = digtron.protected_allow_metadata_inventory_move,
+
+	allow_metadata_inventory_take = digtron.protected_allow_metadata_inventory_take,
+
 	-- Pipeworks compatibility
 	----------------------------------------------------------------
 
@@ -150,17 +156,21 @@ minetest.register_node("digtron:fuelstore", set_logger({
 	end,
 
 	-- Only allow fuel items to be placed in fuel
-	allow_metadata_inventory_put = function(_, listname, _, stack)
-		if listname == "fuel" then
-			if minetest.get_craft_result({method="fuel", width=1, items={stack}}).time ~= 0 then
-				return stack:get_count()
-			else
-				return 0
-			end
+	allow_metadata_inventory_put = function(pos, listname, _, stack, player)
+		if digtron.check_protected_and_record(pos, player) then
+			return 0
+		end
+
+		if listname == "fuel" and minetest.get_craft_result({method="fuel", width=1, items={stack}}).time ~= 0 then
+			return stack:get_count()
 		end
 		return 0
 	end,
 
+	allow_metadata_inventory_move = digtron.protected_allow_metadata_inventory_move,
+
+	allow_metadata_inventory_take = digtron.protected_allow_metadata_inventory_take,
+
 	can_dig = function(pos)
 		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
@@ -252,7 +262,11 @@ minetest.register_node("digtron:combined_storage", set_logger({
 	end,
 
 	-- Only allow fuel items to be placed in fuel
-	allow_metadata_inventory_put = function(_, listname, _, stack)
+	allow_metadata_inventory_put = function(pos, listname, _, stack, player)
+		if digtron.check_protected_and_record(pos, player) then
+			return 0
+		end
+
 		if listname == "fuel" then
 			if minetest.get_craft_result({method="fuel", width=1, items={stack}}).time ~= 0 then
 				return stack:get_count()
@@ -263,7 +277,11 @@ minetest.register_node("digtron:combined_storage", set_logger({
 		return stack:get_count() -- otherwise, allow all drops
 	end,
 
-	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, _, count)
+	allow_metadata_inventory_move = function(pos, from_list, from_index, to_list, _, count, player)
+		if digtron.check_protected_and_record(pos, player) then
+			return 0
+		end
+
 		if to_list == "main" then
 			return count
 		end
@@ -277,6 +295,8 @@ minetest.register_node("digtron:combined_storage", set_logger({
 		return 0
 	end,
 
+	allow_metadata_inventory_take = digtron.protected_allow_metadata_inventory_take,
+
 	can_dig = function(pos)
 		local meta = minetest.get_meta(pos)
 		local inv = meta:get_inventory()
diff --git a/util.lua b/util.lua
index 8f505a7..745be3c 100644
--- a/util.lua
+++ b/util.lua
@@ -431,3 +431,24 @@ digtron.show_offset_markers = function(pos, offset, period)
 		if entity ~= nil then entity:set_yaw(1.5708) end
 	end
 end
+
+digtron.check_protected_and_record = function(pos, player)
+	local name = player:get_player_name()
+	if minetest.is_protected(pos, name) then
+		minetest.record_protection_violation(pos, name)
+		return true
+	end
+	return false
+end
+
+digtron.protected_allow_metadata_inventory_put = function(pos, _, _, stack, player)
+	return digtron.check_protected_and_record(pos, player) and 0 or stack:get_count()
+end
+
+digtron.protected_allow_metadata_inventory_move = function(pos, _, _, _, _, count, player)
+	return digtron.check_protected_and_record(pos, player) and 0 or count
+end
+
+digtron.protected_allow_metadata_inventory_take = function(pos, _, _, stack, player)
+	return digtron.check_protected_and_record(pos, player) and 0 or stack:get_count()
+end