Spawn trapping is a legit strategy because you can only accomplish it after pushing the opposing team back onto their spawns and having the skill to land headshots on players as they spawn. If you don't want to be fighting out of your spawn simply stop the other team from progressing. Have you even watched an mlg halo match ? They spawn trap all the time. I could imagine some of you nerds now getting up while on mainstage to argue with a ref about being cheated from spawn snipes while Walshy, neighbor, ogre twins, pistol a or any pro sat there sniping you as you spawned. If an entire e sports league doesn't consider it cheating if I were you I would just take their word for it.