Modern Warfare 2’s ping system has seemingly been disabled in an attempt to control “wall-hack” cheaters.
Within hours of reports that a ping bug on your death screen could let you track a single player for the rest of the game surfaced, developer Infinity Ward quietly disabled the ping system.
“Huge Bug: You can Ping an enemy during the death screen and the Ping lasts for the whole game, essentially giving you wallhacks on that one player for the remainder of the game,” reported u/zFStatic.