I lived through those years of very wide-spread popular experimentation with astral travel and other such things. Certainly, now and then someone died experimenting with it, as with almost any esoteric technique. But most empahtically there was no effective censorship of how-to-do it books and articles: they could be widely found in pulp magazines and among cheap news-stand paperbacks, and academic research also continued in this or that university laboratory for a while. Some government agencies did indeed research such things for a while, with covert activity in view; and some of the resulting papers and documentation was eventually destroyed -- as much out of embarrassment at being thought to have been gullible as out of fear of their power in other hands.

The article strikes me as writtn not so much to inform as to titillate and chill.