Instead, you pay for your stunts by reducing your fate point refresh level (one in the case of most "mortal" stunts, one or more in the case of supernatural abilities).
That's a really neat approach. I like.
From the article, it seems that there are variable levels of the Lawbreaker stunts. I think that should mesh well with my own preferences and interpretations. I think (in my game, not necessarily the published version) there should be differences in how you break the law, in addition to intent.
Consider the initial murders in Storm Front. The way Harry describes it, it doesn't just take a pile of energy to do that, it also take a whole pile of hatred. I think that just using kinetomancy to throw someone off a balcony would take less energy and less hatred and therefore leave less of a psychic mark.
I think I would adjudicate it that more casual use of black magic would follow the rules presented. If someone wanted to do a murder like in Storm Front, they would get at least two "levels" of the stunt and further uses of black magic of that magnitude would add up quicker.