In the early 1980s I lived in Swiss Cottage, and there was a sanyassid 'health club' (described briefly in this book) up the road, so there were lots of maroon-clad people in the neighborhood. I had a strong and not entirely rational dislike of them, which I couldn't entirely explain. With hindsight we can see that there was a nastiness at the centre of the Bagwan's empire, but I didn't really know about that then. I think it was the way in which the cult took the things that I believed in (communal living, renunciation of materialism, "liberation") and turned them around into their opposite. So it was OK for the Big B to have gold-plated Rolls Royces, and other cult members had to like that to show how they'd moved beyond materialism. Liberation and freeing yourself from control meant being subject to the arbitrary control of the cult's apparatchiks, who could send you around the globe to another commune with or without your children, order you to break up a relationship with someone you loved and who loved you -- in the name of love, of course.
Tim Guest's book describes all this, from the perspective of a child of someone who was initially highly regarded by the cult, but who later fell from grace and was punished for it. Some of the stories are really quite nasty - the Oregon ranch seems to have been awash with guns, homeless people from across America were invited in as 'friends' and then given tranquilisers in their food, the cult spread salmonella in restaurants in the nearby town.
This is a rather upsetting but moving book - the more so because some of the people who joined the cult seem to have been quite nice and to have done so for what must have seemed like good reasons.