Sony's response to the latest breakthrough in compromising PS3 system security was to file a copyright infringement lawsuit against the hackers responsible for the race in the first place. Hacker group fail0verflow and iOS device jailbreaker George Hotz made waves earlier this month when they cracked the PS3's protection against running unlicensed software. Unfortunately, as the code crackers ready their own defense against Sony, plenty more individuals are already taking advantage of the crack in ways the hackers themselves may or may not condone.
Hackers and cheaters have broken loose onto MW2's PS3 online multiplayer with renewed vigor, though it's worth noting this is not necessarily the first time they made themselves known. MW2 hacking was said to be an issue across all platforms well before the workaround to the PS3's system security became stylish, though we can imagine the loophole hasn't exactly helped matters. One of their nastiest tricks, as always, is to seriously mess up the in-game stats and rewards for players unfortunate enough to land onto a hacked MW2 server.
As explained earlier, the latest trick around PS3 system security (by way of fooling the hardware to running unsigned/homebrew code) will prove to be one headache Sony cannot easily patch away through a firmware update. fail0verflow and Hotz believed the only way for Sony to close this gaping hole will be to redesign the way the PS3 system security works, likely calling for a major hardware revision.
As a result of how deep the PS3 system security workarounds work, MW2 developer Infinity Ward itself is claiming that it is at a loss as to how to resolve the issue of MW2 hackers ruining multiplayer games this time around. IW's Robert Bowling addresses the issue in IW's official discussion board for MW2:
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, unless the security exploit itself is resolved on the platform. 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.
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.
In the meantime, IW is exploring any and every option that remains available to them to help affected players in any way possible. Officially, players can attempt to report inappropriate players to Sony as normal. IW notes that it has certainly learned its lesson from relying solely on the console hardware's built-in security measures. Treyarch's Call of Duty: Black Ops, by comparison, is largely exempt from the woes currently suffered by MW2 thanks to the game's own approach to protecting against in-game hacks and exploits.