Time for Truth: I don’t know why you’d assume that MO would believe or disbelieve something.
A Rebbe of mine (who is a well-known Rav in Brooklyn) once told us about something which may be kishuf or just another type of a koach hatumah. He was speaking about all the “mekubalim” who exist, especially in Eretz Yisrael. He claimed that most of them are not legitimate, and should not be trusted. He said how R’ Chaim Kanievsky, whenever he gives someone advice on a matter, will quote a Gemara or other source to back up what he says. He contrasted it with mekubalim who seem to know things, but don’t have a Torah based source for it – and also ask for large sums of money before they’ll help someone. A student asked, “But how do they know these things if they’re not legitimate? Doesn’t it come from the Torah?” The Rebbe replied, “True, the knowledge can come from the Torah. But the Torah also tells us that there are other means of obtaining supernatural abilities, such as witchcraft and other dark methods. They are forbidden. Many of the so-called mekubalim are likely utilizing these methods.”