Christopher Nolan's take on Batman makes it very clear that Batman has a set of rules, or at least 1 rule that he follows and in The Dark Knight (2008), it's addressed several times. That one rule is that he refuses to kill anyone.
Do the previous Batman movies take this into account as well? I most curious about the very first Batman (1989), because in the final scenes in the belfry, Batman kicks a henchman down the the bell tower. We don't see the henchman fall to his death, but one can assume that is what happens, and this is a direct violation of Batman's rule of not killing anyone. Not to mention the Joker died as a direct result of Batmans actions.
Edit: By "Previous Batman movies" I mean all of the non animated Batman movies (Tim Burton/Joel Schumacher) and this would also include the Zack Snyder versions as well.