Not only did the revelation of the PlayStation 3 root key open the gates for homebrew and pirated games to be played on Sony's console, it also allowed hackers to create all kinds of cheats and trainers. Call of Duty: Modern Warfare 2 is perhaps the most affected game, and it seems that this might not change for a long time.
Infinity Ward creative strategist Robert Bowling wrote on the game's official forum addressing the issue and admitting that there is no solution in sight.
"Games rely on the security of the encryption on the platforms they're played on, therefore; updates to the game through patches will not resolve this problem completely, unless the security exploit itself is resolved on the platform. However, that doesn't mean we're not going to look into every option available to us."
"Regretfully, Call of Duty games are receiving the bulk of the hacker's attention, due to its high player counts and popularity. However, the number of legitimate players severely outweighs the bad apples."
Bowling had no better advice to offer other than that "if you are concerned about playing with players who are hacking, I encourage you to play exclusively with friends by utilizing the party or private match options in Modern Warfare 2 and Call of Duty 4 to avoid such players as much as possible until this issue is resolved by Sony."
"At this time, we do not have the ability to restore or adjust individual stats," he admitted.
"This only applies to legacy games such as Call of Duty 4 and Modern Warfare 2. In the future we plan to adjust our approach to not rely solely on platform security and reduce the ability for this to happen in our games, as has already been displayed by the work Treyarch has done on Call of Duty: Black Ops to prevent similar measures."
For the time being Infinity Ward encourage players to report cheaters to Sony.