Clearly, there was something in the water over at DC in the mid-80s – Green Lantern and Flash were both unmasked in continuity, and then in 1986's Superman #423
, Alan Moore and Curt Swan had Clark Kent revealed to be Superman right in the middle of a live TV broadcast.
In "Whatever Happened To The Man of Tomorrow?" the Toyman and Prankster pull one final grand scheme and, having discovered Superman's secret identity by torturing Pete Ross to death, attack Clark Kent while he's on air, knowing full well that he'll be revealed as Superman to the world. Yes, it wasn't officially in continuity – and within a month of the story's publication, John Byrne would reboot the Man of Steel altogether – but nonetheless, the Crime Syndicate would've been proud.
And now, Superman has undergone a similar revelation in his recent comics, with Lois Lane having outed him as Clark Kent to save him from the villainous Hordr.