This article caught my eye- and held my attention through a very long plane ride. The similarities in thought control methods between the Witnesses and the Scientologists are amazing. Although they are very different doctrinally- the control, guilt, isolationism, and leader-worship are very similar. Its a long article- but very worth it:
http://www.newyorker.com/reporting/2011/02/14/110214fa_fact_wright