Question is....why sign him then if all he was gonna do is walk the sideline? I understand Harbaugh wanted players who can also add depth at in more than one position but doesn't make sense with Jacobs. They signed him for a reason and Harbaugh is being tight-lipped about it, even to Jacobs. But yeah, Harbaugh is not a coach you want to start battling with through the media. If Jacobs is frustrated he best talk to Harbaugh and not the media.
Learn from Moss! Haven't heard a peep about not getting balls.