Re: Black Magic
Black magic usually has the connotation of negative effects, "witchcraft," "Devil's work" or any other medley of terms.
Using the words, "Black Magic" to discuss what you are doing is a bad decision really. Most communities will view it as these out-dated folklore inspired tails that are nothing but detriments to their own growth.
Magic by itself really comes down to the terms of energy manipulation and use. If I were you, I would try and find a better term for what you do, you will find opposition anywhere you use the term which has a very different meaning from the one you wish to convey.
The maximum effective range of an excuse is zero meters.