To be frank, I'm tired of people educating on this subject. It does not make you look smarter, it just looks like you're copying what every other typical witch will say.
All too often, when somebody will post a question about black magick or white magick, many people will completely ignore the question and go off on a tangent about how it's all in the intent of the caster. We know this already, so please stop. Usually, when referring to black magick, we are naming it so to colourise our intent, not the magick itself, to avoid any confusion. So please, I implore you, stop pratting on about it.