The Living Force
Was Monroe a conscious disinfo agent? Maybe not but in my view he may have been a useful idiot of 'Cosmic Cointelpro' (4D STS influence) to further the agenda of the New Age movement and start a movement that goes contrary to common sense.
Fair enough, that is certainly possible. At the same time, out-of-body-experiences do give some valuable data (eg. what the "afterlife" is like) that is consistent across the many people who have done it.
Besides that, the only potentially positive aspect of out-of-body experiences seems to be the direct experience that one is not just the body and that death is not the end. It is quite a paradox that most people are not paying much attention to their bodies, but at the same time are fully identified in the idea of being "just the body".
I don't know if OOBE's are life threatening. There are many people who have been doing those regularly for years and even decades, yet I am not aware of any instances of people who practice OOBE's dying from it.