The Riddle of He Who Must Not Be Named

[Bart Lidofsky]

No: HPFGUIDX 167053

Even Muggleborns seem to have the prejudice against saying "Voldemort". Yet, Dumbledore, Lupin, and Sirius seem to have no problem saying it. I suspect that, if Dumbledore had not specifically told him to use the name, Harry would have developed the same prejudice. Yet, the reason behind this has never been revealed in the canon, as far as I know (it might have been revealed in interviews). 

Any theories?

My best guess: Anybody who a DE or agent overheard using the name, "Voldemort" was targeted for Something Bad (but probably not death, because dead men don't spread rumors). They were subtle enough that the victims had no idea that it was done by a human agent, and therefore assumed that Voldemort had managed to curse the pronunciation of the name itself. 

Bart