#13 made immune against TNT and aggressive mobs

elevator.lua

@@ -74,6 +74,10 @@ minetest.register_node("travelnet:elevator", {
 			  travelnet.remove_box( pos, oldnode, oldmetadata, digger )
     end,
 
+    -- TNT and overenthusiastic DMs do not destroy elevators either
+    on_blast = function(pos, intensity)
+    end,
+
     -- taken from VanessaEs homedecor fridge
     on_place = function(itemstack, placer, pointed_thing)
        local pos  = pointed_thing.above;

init.lua

@@ -22,6 +22,8 @@
  Please configure this mod in config.lua
 
  Changelog:
+ 17.07.17 - Added more detailled licence information.
+            TNT and DungeonMasters ought to leave travelnets and elevators untouched now.
  16.07.17 - Merged several PR from others (Typo, screenshot, documentation, mesecon support, bugfix).
             Added buttons to move stations up or down in the list, independent on when they where added.
             Fixed undeclared globals.

travelnet.lua

@@ -78,6 +78,10 @@ minetest.register_node("travelnet:travelnet", {
 			  travelnet.remove_box( pos, oldnode, oldmetadata, digger )
     end,
 
+    -- TNT and overenthusiastic DMs do not destroy travelnets
+    on_blast = function(pos, intensity)
+    end,
+
     -- taken from VanessaEs homedecor fridge
     on_place = function(itemstack, placer, pointed_thing)