i think it works

MAJOR antag backend update
- you cannot bruteforce the pen anymore
- uplink now uses bitflag to lock purchases
- poplock is handled entirely by the buyable uplink items
- tgui antag intro (for selected ones)

code/game/objects/structures/noticeboard.dm

@@ -121,7 +121,7 @@
 
 /obj/structure/noticeboard/deconstruct(disassembled = TRUE)
 	if(!(flags_1 & NODECONSTRUCT_1))
-		new /obj/item/stack/sheet/iron (loc, 1)
+		new /obj/item/stack/sheet/metal (loc, 1)
 	for(var/obj/item/content in contents)
 		remove_item(content)
 	qdel(src)