If being fair is so high on Obama's list, what's the deal with Acorn?

Obama, the Democrats and his lib friends fight really hard for fairness. If so, why do they need a organization like Acorn to help them "make sure" that dead people, children, members of the Dallas Cowboys, Mickey Mouse, pets and multiple personalities get a chance to vote? If Acorn is innocent, why is the FBI investigating it and why have multiple states been suspicious of their efforts? Not fighting fair, are they?