Batman and Robin

As you may already know, The Dark Knight now has more money than the United States. That's partially because the caped crusader has robbed U.S. citizens of over 525 million dollars in the last three months. I guess that's okay, though, because he seems nice. I think one of the main reasons that movie's been so successful is due to its complete lack of Robin.

Was Robin left out because Batman's strength is diminished by the mere presence of a sidekick? Was Robin snubbed because a "dark knight" can't sneak up on criminals in dark alleys when his companion's wearing a Bolivian flag? Those are possible reasons, but I believe Robin was only slighted for being more annoying than he is useless? But whatever the case may be... holy thanks for leaving Robin out of your movies, Batman.