And I also think that Rennie does not want to add any advertising to the fact that he was in that weird Rawat cult. He seems to have worked very hard to leave any reference to Rawat out of his history, resume, or anything else. I think he might fear that if he wrote something, it would just bring it all up again. This is just my speculation, but I can understand the way Rennie feels.
But like Michael Dettmers, he may well have a sense of social responsibility and eventually come to the conclusion that he has a moral obligation to speak out about this, and help dissuade new cult recruits. I doubt, however, that the "Coolchill" group has a clue who Rennie Davis is. It's mostly middle aged folks like us who remember who he is, both inside and outside of the cult.