From what I recall hardly anybody received knowledge in the West after about 1975, but during the dark, devotional period it was very hard to leave, because FEAR became a huge element in the cult, much more so than it had been. Malibu Prem was basically saying you would go to hell if you left.
Joe, I don't remember him saying anything specific about "going to hell" but I do remember the falling/jumping off Maharaji's boat metaphor and then having to deal with sharks in the ocean of maya.
Perhaps Hilltop could find that one.