Some Borderlands 2 players are hacking the game on Xbox 360, and developer Gearbox Software is advising people to play online only in private games with friends until a patch to resolve the issue is released.
The problem does not exist on PC or PlayStation 3.
According to Gearbox community manager Chris Faylor, "a few users" are "using an external application to maliciously disrupt the experience and sabotage characters of legitimate Borderlands 2 players on Xbox 360." The studio has already submitted a patch to Microsoft for testing, and it will be released "as soon as possible." But until the patch is available, Gearbox is saying that Xbox 360 players "should consider playing online with trusted individuals in non-public sessions" if they want to avoid any danger of encountering the hackers.
In addition, the company suggests taking the following actions to ensure the integrity of their Borderlands 2 characters:
We also advise that before ceasing play, users always select "Save and Quit" from within the pause menu while their character is alive. If after the death of their character players find themselves at the main menu of Borderlands 2 instead of respawning in-game, be sure to immediately select "Continue" to resume playing as that character.
Finally, Gearbox is asking Borderlands 2 players to report any suspicious activity to the studio via email, in order to help in the investigation of this issue.