Re: Batmans #1 rule
NO WAY...accidental deaths like Dent's are not exceptions to Batman's rule.
As for Ra's Al Ghul, he wasn't killed by Batman. He may have ended up in a deadly situation, but Batman didn't actually, physically kill him. Dent, however, was TACKLED OVER A BUILDING by Batman, and fell to his death. Batman could have gone about saving the boy differently, but no.
Ironic how Dent & Rachel died in the same place (250 52nd Street).
Also ironic how Bruce Wayne/Batman lost 2 people central to his crimefighting abilities in Rachel & Dent, and ALMOST lost a 3rd in Gordon.
Of course, this is ALL ASSUMING that Dent & Ra's Al Ghul are actually dead.