This happens with every single COD that comes out. People hack the leader boards and nothing gets done about.
Why is there never a team set up to monitor the leader boards when the game is released and ban every single player that hacks them?
Thanks for taking the time to report this to us. We do have a security team that overlooks all submissions of suspected terms of service violations. They look into all reports on a case by case basis, and it may require time before bans and leaderboard corrections are made. If you do see any users abusing the game, please make sure to use the in game reporting tool.