Add patch for interact event. Fixes issue #53. Thanks @swifteh

src/main/java/com/massivecraft/factions/listeners/FactionsBlockListener.java

@@ -37,7 +37,7 @@ public class FactionsBlockListener implements Listener {
         }
 
         if (!playerCanBuildDestroyBlock(event.getPlayer(), event.getBlock().getLocation(), "build", false)) {
-            event.setCancelled(true);
+            event.setBuild(false);
         }
     }
 

src/main/java/com/massivecraft/factions/listeners/FactionsPlayerListener.java

@@ -305,6 +305,23 @@ public class FactionsPlayerListener implements Listener {
             return true;
         }
 
+        // Dupe fix.
+        Faction myFaction = me.getFaction();
+        Relation rel = myFaction.getRelationTo(otherFaction);
+        if (!rel.isMember() || !otherFaction.playerHasOwnershipRights(me, loc) && player.getItemInHand() != null) {
+            switch (player.getItemInHand().getType()) {
+                case CHEST:
+                case SIGN_POST:
+                case TRAPPED_CHEST:
+                case SIGN:
+                case WOOD_DOOR:
+                case IRON_DOOR:
+                    return false;
+                default:
+                    break;
+            }
+        }
+
         // We only care about some material types.
         if (otherFaction.hasPlayersOnline()) {
             if (!Conf.territoryProtectedMaterials.contains(material)) {
@@ -316,9 +333,6 @@ public class FactionsPlayerListener implements Listener {
             }
         }
 
-        Faction myFaction = me.getFaction();
-        Relation rel = myFaction.getRelationTo(otherFaction);
-
         // You may use any block unless it is another faction's territory...
         if (rel.isNeutral() || (rel.isEnemy() && Conf.territoryEnemyProtectMaterials) || (rel.isAlly() && Conf.territoryAllyProtectMaterials)) {
             if (!justCheck) {