Most of those involve tampering, medling, and manipulation in a way that they aren't endowed abilities, and that includes a gifted power brought about by others actions affecting someone, and i exclude accidents because often they occur due to spiritual negligence.

It's useless to try and explain my reasoning unless you could see things on the other side of the veil, with all the corrupt things in this World and the other, and how it plays upon the spirits, and filters in and out of reality.

Most of those things are like a curse and a disability, it may seem enticing but the reality of the concequences reverberate, and do more harm than good.

mechanicaly created powers on the other hand are subject to the laws of nature involving who it is that choses to wield such powers and for what purpose.