Hello FreakyChakra,
Many well-educated, highly intelligent people get involved in cults, and for different reasons. For example, having been impressed by the methods of a particular group leader, they might get involved to pursue their own agenda for wielding power within the inner circle of a given cult. They may be over-idealistic and see the group they've joined as fulfilling ideals they have subscribed to for several years. They may be intelligent but socially or psychologically maladjusted or simply be individuals attached to certain odd beliefs with a tendency towards dogmatism. Just because someone's smart and educated doesn't mean to say they can't be conned or manipulated.
Brainwashing techniques may be used by less obscure or more powerful agencies, not just New Religious Movements, sects or cults. Robert Jay Lifton's classic study of brainwashing, Thought Reform and the Psychology of Totalism
[
www.culteducation.com] and the Eight Criteria for Thought Reform emerged from research into the totality of the Chinese communist ideology.
There is some discussion of tactics used by the media, commercial businesses, governments etc at the Cult Education Forum under other headings but the "Cults," Sects, and "New Religious Movements" section deals with mainly those types of controversial groups or movements.
As re: Desteni, if you'd like to discuss that particular group please feel free to contribute to the Desteni thread.