Anytime a so-called religion utilizes its "members" as slave laborers to enrich the "founder" of the same religion and utilizes brainwashing techniques to turn its adherents against their family members (or to extort money from the same), I'd call that a cult. Cultish behaviors of the so-called Unification Church ("Moonies") have been well-documented.
Now, the Mormons, that's a little more complicated subject... Mormons, if possessing a little kookie theology (that Jesus was on the Americas), are very model citizens - community- and education-oriented and generally very industrious. However, the trouble starts when they become the preponderant religion in a given area...
Thank goodness we are a secular country.
Skorzeny