Recently a few users have begun violating the Xbox Live Code of Conduct by using an external application to maliciously disrupt the experience and sabotage characters of legitimate Borderlands 2 players on Xbox 360.
An update to address this has been released via Xbox Live. For more details, visit http://support.gearboxsoftware.com/entries/22147216-xbox-360-update-information.
This does not affect players on PC or PlayStation 3.
We ask that players report any suspicious behavior in Borderlands 2 to firstname.lastname@example.org and provide as much details and documentation of their disrupted experience as possible to assist us in our investigation.