Barca7788 has a valid point. Forums tend to reflect the general mood of Manchester fans and the media. And the media affects the players. If the general consensus is that the favourites are United, that will play into our hands, because United will be under pressure, and we will be underdogs.
Sure yes, but some of the younger players will surely be harder to control. You can't just seal out their minds and say "you guys you can't be overconfident". Players aren't infallible, no matter how good the manager is. I'm just saying that it's unfair of you to dismiss 7788's point like that...