Not sure what drives him to be honest, not sure it's passion. Although if you photograph as much as he does, it must be. But I've known him for many years (we all come from an old forum now gone) and still have no idea who he is. He's hard to figure out. Still, your suggestion is something to think about. Thanks.He's bored.
Give him something to do. Moderate? Write Articles? etc he has passion. don't stifle it - leverage it.