Whoever wrote this article is a fucking tool. You can do this on ps3 as well hence the reason I play 1 match and quit. Its too hacked. On with story
Infinity Ward was quick to fix some of the major bugs that had been
plaguing the multiplayer portion of Modern Warfare 2. Using a
combination of unusual button sequences, weapon swaps, and sometimes
careful jumping players have been able to exploit the game's
programming to cheat. Two of the more prominent bugs (the Javelin and
Care Package glitch) were fixed in the most recent online update, as
well as many of the bugs allowing players to move inside walls. However
some of the exploits remain in the game, and have seen increased use
with the removal of other exploits.
Known as the Public “Private Match” Hack, the exploit cleverly allows
players to create their own private match, of which they can gain
double experience from. Private matches can normally be created for
more intimate play against friends or rival clans, but are generally
created by invite only. The most disruptive part of this particular
glitch is the fact that it takes players out of the games they'd
selected, and instead drops them into a game not of their choice.
Additionally, as the bug heavily involves the use of friends lists and
the Xbox Live interface it can only be done on the Xbox 360 version of
Modern Warfare 2.
Other aspects of this glitch allow you to kill players on the same team
and have their death count towards your overall score. This also
effects killstreaks, which can then be used to kill more team members
if the exploiter wishes. Robert Bowling, Director of
Communications/Community Manager for Infinity Ward has posted up on
Twitter that they are aware of the issue, and are currently looking
into the exploit.
These sorts of exploits are very frustrating, particularly since the
issue lies directly with Xbox live and how it interacts with the
in-game matchmaking. The situation is very different than it was with
the Javelin glitch. It is however unfair to the large majority of the
player base to be dragged into a game type they had no intention of
being a part of. Worse then that, there seems to be no way to really
escape it aside from hoping that it doesn't happen. Having experienced
the bug firsthand, I personally hope that Infinity Ward develops a
patch quickly. It's really hard to want to play with so much rampant
cheating.