What happens to a reporter at Alabama if he goes around the official channels of communications and starts asking scout team players about inside information? What happens to reporters who cover Apple if they go to lower level workers to try to get inside information about the company or products? In both of those cases, those reporters lose access to the "official" channels of communication.
Ken doesn't have to let the GTAA tell him how to cover them. However, IF Ken is snooping around scout team players to get "unofficial" information, then the GTAA could revoke his access to press conferences, players(at least in an official capacity), press areas for the games, etc. The GTAA should not tell a reporter that they have to make positive and glowing stories, but they can and should limit access to information that they consider confidential. If a reporter wants better stories and better access, then one way to get that access is to respect confidential information, not to seek it out and blast it to the public. If a reporter wants very little access, but an occasional bombshell, then the way Ken does it is the way to do it.
The mutt coach a few years ago basically told the press that they cannot release injury information until the head coach had issued a statement. They did that because a reporter tweeted an injury report from the practice field and the players parents learned about the injury from the press before the staff had an opportunity to inform them. The mutt press actually respected his wishes and stopped reporting about injuries until Richt announced it. Many of those same reporters also reported that Richt was a terrible coach and that the mutts should fire him. There are ways for a reporter to be independent, yet respectful.