Would a Batman who in his early years could clearly be in over his head be tempted to form an alliance with a mobster in order to attack a greater perceived evil? And what if a minor criminal could offer inside information to the Batman, provided that he is allowed to commit minor crimes?
These scenarios deal with questions of moral calculations, but what about a corruption that could be created as a result of romantic interests between Bruce Wayne and the Catwoman, or as a result of a relationship with a woman who is clandestinely part of a criminal organization? If you think this is a farfetched possibility, just look at the political scandals that have involved everyone from prominent politicians such as President Bill Clinton to some of the Secret Service agents that were tasked with protecting President Obama.
What makes this comic book such an integral part of comic history, is that Frank Miller presents what could be seen as a documentary into an era that did take place, with realistic real life decisions, through the eyes of the infamous Dark Knight.