Identify the very naïve statement Marcus makes about the media just before he pastes his pre-written comment into the game chat.

I'm not sure what message you are referring to? Here the beginning of the chapter:

I blogged the press-conference even before I'd sent out the invitations to the press. I could tell that all these writers wanted to make me into a leader or a general or a supreme guerrilla commandant, and I figured one way of solving that would be to have a bunch of Xnetters running around answering questions too.