Well, there is always the option that he is set up as a false dragon. I keep looking at his age and he's a lot older than most (usually they die a lot sooner) and I can't help but think he's been hiding on a stedding. And then I think, well, why would he leave a stedding if he stayed there for so long? Maybe someone found out and it and used his madness to their own ends. Maybe he does try to do some good but fails.