"I'm Batman!"

What is so hard to understand about this? Bruce Wayne, a well-known billionaire and Gotham celebrity, decides to disguise his voice with an intimidating fear-inducing growl when he dons a tricked-out suit of body armor. Would you rather have him use his smooth regular voice making snide remarks as he throws a guy off the roof? It would be like Captain Planet tossing the bad guys into the dumpster and saying something like, "Time to take out the trash!"

I guess I just don't see how Batman could effectively use any other kind of voice. Gee willickers.