It is not just about griefing, it is also about socializing. Imagine you're sitting on your couch with some friends and play but one wrong word might shut down the console (or just tab out with the new tabbing stuff they are so proud of). So all you could do is play the game without talking about stuff. And of course people will want to talk about the game, the new console, the old console or just completely unrelated stuff that might be misinterpreted by the box.
If something wrong is said while the box is in standby, the people around it might not even notice it. Especially with the skype support they're so proud of...
If something wrong is said while the box is in standby, the people around it might not even notice it. Especially with the skype support they're so proud of...