And I give them credit -- they have a lot of message discipline.

WHITEHOUSE: Remarks by the President at a Campaign Event

The Obama campaign, like the Bush White House, prides itself on message discipline and tracks down leakers with a frightening intensity.

NEWYORKER: On the Bus

Mr. Morrissey, for example, traces his lack of respect for the American cult of message discipline to his disdain for American football, that most top-down of sports.

WSJ: Book Review: Ozzie's School of Management

Staying on message during a media crisis takes tremendous discipline and the ability to ignore normal formats of acceptable conversation.

FORBES: Handling the media during a crisis -media training

This discipline has been particularly notable when it comes to message control.

ECONOMIST: Lexington

The Mailbox app for the iPhone tries to enforce good inbox discipline by making people choose what to do with every message they get.

BBC: Why your inbox fills with bacn instead of spam