What you are seeing in "in plain sight" stuff, is just these people trying to make normal many of their outer rituals.

If you assumed it was all true, every last bloody detail, you will only have scratched the surface.

Many books have talked about making a deal with the devil.
And, today, the "devil" is considered only a mythical creature. A story to scare children.

Further, people are being lead into an area where right and wrong, good and evil are just subjective. Even more, the psychopaths in movies are termed "evil" however, they are just a mockery of evil. The real evil always shows a nice face and good intentions. It is the stuff that really destroys a person.

So, would you sacrifice your children to the devil for more power?