Red Dead Redemption game saves out of existence. If you're one of these miscreants, but you'd rather not have your Gamertag/PSN ID permabanned from the Wild Western's multiplayer component, you still have an out: Delete your hacked game saves. Yep, your single-player saves, too. It's harsh, we know -- but maybe you should have thought of that before adopting your life of petty crime.
For more info on how to avoid the Harvest of the Cheaters™, check out Rockstar Games' official blog.