Fix lasso buckle (#1246)

Co-authored-by: Pieter-Jan Briers <pieterjan.briers+git@gmail.com>

Content.Shared/GameObjects/EntitySystems/EffectBlockerSystem.cs

@@ -0,0 +1,32 @@
+using Robust.Shared.GameObjects.Systems;
+using Robust.Shared.Interfaces.GameObjects;
+
+namespace Content.Shared.GameObjects.EntitySystems
+{
+    /// <summary>
+    /// This interface gives components the ability to block certain effects
+    /// from affecting the owning entity. For actions see <see cref="IActionBlocker"/>
+    /// </summary>
+    public interface IEffectBlocker
+    {
+        bool CanFall() => true;
+    }
+
+    /// <summary>
+    /// Utility methods to check if an effect is allowed to affect a specific entity.
+    /// For actions see <see cref="ActionBlockerSystem"/>
+    /// </summary>
+    public class EffectBlockerSystem : EntitySystem
+    {
+        public static bool CanFall(IEntity entity)
+        {
+            var canFall = true;
+            foreach (var blocker in entity.GetAllComponents<IEffectBlocker>())
+            {
+                canFall &= blocker.CanFall(); // Sets var to false if false
+            }
+
+            return canFall;
+        }
+    }
+}