Just read this article on Destructoid that tells of a strange virus that's spreading amongst the XBOX 360 Modern Warfare 2 community. The virus, which started as a mod for the PC version of MW2, constitutes of the player obtaining infinite grenades and ammunition (alongside weapons that never require reloading) and appears to infect its victims via "carrier" players who have caught it from another player (which has earned it some delightful comparisons to STDs).
 
As of now there is no cure for the bug, but Microsoft and Infinity Ward have both released assurances of their speedy progress on a solution as well as threatening those spreading the virus with permanent XBOX Live bans. Destructoid alludes to this being some kind of uprising by disgruntled MW2 PC players due to the decision by IW to axe dedicated servers, but I think this is simply a case of people on the internet being assholes. Again.

While the symptoms of this glitch may initially seem appealing to some, try to remember that a game isn't fun if it has no rules, especially if that game revolves around competition on a level playing field. With that in mind, you might want to steer clear of MW2's competitive online offering for the next few days while the issue is resolved. Hell, there's always Spec Ops with friends, right? 
 
Thanks for reading,
End Boss.