*орёт*
ES: What prompted people to start referring to Voldemort as You-Know-Who and He-Who-Must-Not-Be-Named?

JKR:...On a more prosaic note, in the 1950s in London there were a pair of gangsters called the Kray Twins. The story goes that people didn’t speak the name Kray. You just didn’t mention it. You didn’t talk about them, because retribution was so brutal and bloody. I think this is an impressive demonstration of strength, that you can convince someone not to use your name. Impressive in the sense that demonstrates how deep the level of fear is that you can inspire. It’s not something to be admired...