One of the things that used to honk gamers off on the PC is when a teammate dies, flies around in spectator mode, and calls out the other team player's hiding spots. Well, Microsoft is letting the game dictate whether you have to be in the game chat when playing multiplayer as Call of Duty: Modern Warfare 2 won't let you play multiplayer
if you are in party chat.
This is one feature that's probably long overdue on the 360 and I'm glad it's finally being put in. Nothing sucks more than finding a good hiding spot only to have the opposing team member run in and shoot you as if he could see through the obstacles you are hiding.