Even the Old Testament tells you that no one (except the chosen people of course) is 100% accurate e.g. magicians/mentalist must be the chosen people.
The claim of "healing" witchcraft makes little sense but sadly, the idea of removing curses, hexes, bad luck, etc. is a very old con that goes back centuries. You can get a solid glimpse as to how it all works by reading Anna Riva's BLACK & WHITE MAGICK -- it's a classic to the witchcraft/ gypsy game... but then Anna was the self-proclaimed successor to Ms. MARIE LAVEAU (of which, there was mother & daughter, the latter of which died in the early 20th century, never living up to mommies reputation)
I'm presently involved in an investigation on a local psychic who has been using some of these very same ploys; what is legally seen as "Larceny". Sadly, the predators from within this trade have learned how to hide behind religious rights in order to elude legal action. Here in the U.S. the laws vary not just from state to state but in some instances, city to city. The hustlers know this and seek out "safe zones" from which to operate. Our current "mark" owning a huge complex in the middle of downtown Noho (easily worth over 2 million in US dollars) and charges over $1,000.00 for the same computer generated chart anyone else can create given the software. Just a Tarot Card Reading averages $50.00 for 15 minutes and she whines about that being lowering than she wants to charge.
Not to go too far off topic, but I love this particular sting in that this woman believes me to be "just another Reader" from the region. She has no idea, the fact that she has one seriously educated "magician" on her tale that's being assisted by none other than Simon Lovel's ex-wife (who is also a Reader here in town).
Stings of this sort take time. Not only do you have to build up trust between you and the mark, you need to make certain that the authorities are in position for witnessing the dirty deed or "deeds" in this case, so as to make an official bust. Thus far we've only been able to embarrass her with a couple of Newspaper articles featuring testimonials by her patrons that were taken for tens of thousands of dollars in a curse removal scam.
I realize that many within the magic world loathe any kind of Reader. As one that actually is a Reader and has supplemented his income on and off for decades as such, I can tell you first hand that there is a huge difference between the typical Reader and predators of this sort. I will also state that most legit Readers will bend over backwards in helping authorities bust the scam artist in that such people hurt their business.
Legit Readers do not go into the Healing or Curse removal game... at least not for profit. I have conducted such rituals a few times but no money every exchanges hand. Same goes for some of the "Psychic Investigation" work I've done on car theft rings and missing people (do bear in mind that Kreskin and numerous others have and do, do the very same things).
My point is, NOT ALL READERS/PSYCHICS ARE LIKE THIS.
