This should make us AntiCheat friendly.

Changelog.txt

@@ -8,6 +8,7 @@ Key:
   - Removal
 
 Version 1.3.09
+ + Added compatibility with AntiCheat (Which I highly recommend to prevent cheating)
  + Added several permission nodes to give individual users special perks (Double/Triple/Quadruple XP)
  + Added API for plugins to add custom tools directly via Spout
  = Fixed issue with NoCheatPlus and Serrated Strikes / Skull Splitter (fight.noswing)

src/main/java/com/gmail/nossr50/events/fake/FakeBlockBreakEvent.java

@@ -12,4 +12,4 @@ public class FakeBlockBreakEvent extends BlockBreakEvent {
     public FakeBlockBreakEvent(Block theBlock, Player player) {
         super(theBlock, player);
     }
-}
+}

src/main/java/com/gmail/nossr50/events/fake/FakeBlockDamageEvent.java

@@ -0,0 +1,14 @@
+package com.gmail.nossr50.events.fake;
+
+import org.bukkit.block.Block;
+import org.bukkit.entity.Player;
+import org.bukkit.event.block.BlockDamageEvent;
+import org.bukkit.inventory.ItemStack;
+
+public class FakeBlockDamageEvent extends BlockDamageEvent {
+
+    public FakeBlockDamageEvent(Player player, Block block,
+            ItemStack itemInHand, boolean instaBreak) {
+        super(player, block, itemInHand, instaBreak);
+    }
+}

src/main/java/com/gmail/nossr50/util/Misc.java

@@ -13,6 +13,7 @@ import org.bukkit.inventory.ItemStack;
 import com.gmail.nossr50.mcMMO;
 import com.gmail.nossr50.config.Config;
 import com.gmail.nossr50.events.fake.FakeBlockBreakEvent;
+import com.gmail.nossr50.events.fake.FakeBlockDamageEvent;
 import com.gmail.nossr50.events.fake.FakePlayerAnimationEvent;
 import com.gmail.nossr50.events.items.McMMOItemSpawnEvent;
 
@@ -110,14 +111,15 @@ public class Misc {
             FakePlayerAnimationEvent armswing = new FakePlayerAnimationEvent(player);
             mcMMO.p.getServer().getPluginManager().callEvent(armswing);
         }
+        
+        FakeBlockDamageEvent damageEvent = new FakeBlockDamageEvent(player, block, player.getItemInHand(), true);
+        mcMMO.p.getServer().getPluginManager().callEvent(damageEvent);
+        FakeBlockBreakEvent breakEvent = new FakeBlockBreakEvent(block, player);
+        mcMMO.p.getServer().getPluginManager().callEvent(breakEvent);
 
-        FakeBlockBreakEvent event = new FakeBlockBreakEvent(block, player);
-        mcMMO.p.getServer().getPluginManager().callEvent(event);
-
-        if (!event.isCancelled()) {
+        if (!damageEvent.isCancelled() || !breakEvent.isCancelled()) {
             return true;
-        }
-        else {
+        } else {
             return false;
         }
     }