In Gotham Adventures #35, Bruce is made part of a jury for the court case of a man that was apprehended by Batman.
And he just fuckin. He Does That
What seems to keep his cover isn’t secrecy (though there’s plenty of it), but instead just how absolutely outrageous the idea is. Bruce Wayne??Batman??? Puh-lease. I mean, have you seen the guy? Sure he’s a nice guy, but he’s far too busy having people run WE for him and going on pleasure cruises to be Batman. I mean, really.
(Good thing nobody notices the cool symbolic silhouette deal he’s got going on there.) It’s likely become something akin to the ‘Ted Cruz is the Zodiac Killer’ joke, (check out this post) and Bruce often just feeds it, making it even easier to get away with. It’s fucking hilarious.
I swear Bruce gets away with it because everyone assumes he’s Gotham’s answer to Bobby Newport. Imagine Bobby Newport as Batman. And you kind of get it.