Why didn't DD reveal Voldemort's identity?

[Carol]

No: HPFGUIDX 186958

Carol earlier:
> > Where do you find the idea that anyone thought that he wasn't human? As far as I can recall, everyone--both his own followers and the WW at large--viewed him as a Dark Wizard. No one suspects him of being, say, a super-intelligent Troll or some new kind of monster. Besides, he uses a wand, which is a bit of a hint that he's a Wizard.
> 
> Magpie:
> A dark wizard who's gone so far beyond the normal meaning of "wizard" that they're afraid to say his name or ever think he won't return. They don't treat him like a dark wizard, they treat him like the monster he's written as. He's "The Dark Lord" and "Lord Voldemort." Tom Riddle's publicity campaign for himself was very effective. People basically know that Batman is a man too, but in his urban legend incarnations he also goes beyond merely human.
>
Carol responds:
But that's because of what he's done *as* a Dark Wizard. Having gone beyond being merely human doesn't mean that he didn't start out human. The DEs *know* that he started out human; he's told them that he's done more than any other Wizard to become immortal. However, that doesn't keep most of them (aside from Snape and the Lestrange gang) from thinking that he's dead. 

How on earth would knowing that his name was once Tom Riddle (or George Jones or any other name) cause them to view him any differently? they know he was human once. Ollivander sold him his wand; Slughorn taught him and included him in his Slug Club. Lucius (until CoS) has the diary he created at school that proves he's the Heir of Slytherin.

The WW doesn't need urban legends to know that this guy is not normal. All they need to know is what he's done (or some of it) and what he looks like. He has *become* inhuman. He's *made himself* inhuman (and impossible to kill even though he can be vaporized). That's scarier than if he had somehow been born Lord Voldemort, snake-faced super wizard--which, in any case, they would know is impossible.

If Voldemort had killed my family and you said to me, "But he was once Tom Riddle," I would say to you, "What comfort is that? He murdered my family. He's an inhuman monster." What he once was is irrelevant. It's what he became that matters.

As for not treating him as a Dark Wizard, I can't be sure but I think you're mistaken. Wormtail, for example, says that Voldemort has powers that the others can't imagine, but they're Dark powers that "the greatest Dark Wizard of all time" would be expected to develop. Snape speaks of Dark Magic as the enemy that they're fighting and says that Inferi can be created by a Dark Wizard. He also speaks to Bellatrix of the DEs' hope that Harry Potter might be an even more powerful Dark Wizard that they could rally around.

Carol, wondering how people treated that other indisputable Dark Wizard, Gellert Grindelwald, and pretty sure that they feared him even though he kept his handsome face