Take the example of the German cult leader Paul Schaefer.
A recent news article http://news.bbc.co.uk/2/hi/americas/4562918.stm
says that one follower even tortured children on his behalf:
"Gisela Seewald, 75, is said to have told a judge that she gave them electroshock treatment and sedatives.
She was ordered to do so by the group's ex-leader, Paul Schaefer, who said they were possessed, she reportedly said.
It is alleged that the treatments were applied to teenagers who disobeyed adults or showed interest in the opposite sex."
In discussions with UBF members, however, they like to tell us that "brainwashing" to make people obedient is only fiction.
Remember also the Milgram experiment, see e.g. http://www.new-life.net/milgram.htm