Earlier quoted context omitted.
Is it like the astral doppleganger? There's a whole chapter and six levels before that idea: The Psychonaut Field Manual - https://news.ycombinator.com/item?id=42563946 - 3 months ago (70 points, 61 comments) i.e. the need to prepare, and the first step in level seven is circle of protection.
I don't know, I never read that manual. Not particularly curious to do so. I am talking about autonomous cultural mechanisms. I cannot correlate it with works from another author. The "dillution by correlation" is also a kind of autonomous cultural mechanism that preys on the human proneness to identify patterns. These manuals for training seem to good to be true, and if they are, too obvious to remain effective.
Problem is innoculation is impossible; only active "treatment" is like repeating a series of phrases or something. Reasoning through a series of affirmations.