FWIW Ben Arfa would have worked his bollocks off doing whatever Keegan and Sir Bobby told him. They'd equally get him believing to do what it takes wherever on the pitch b/c they'd have put an arm around him and joked with him at how easy it is for him to round players and cause havoc.
IMO, Ben Arfa seems exactly the player who will run through a wall for you if you just treated him the right way and believed in him. Know that he has his "bad" and "good" days