One might look at it this way,
First of all, to the best of my knowledge, no one channels anyone who is currently alive. I mean could you imagine if somebody started claiming that they were channeling President Bush, or, Michael Jackson??
Could be it happens one day but not as far as I know.
The majority of these "entities" are either deceased, "ascended masters" (the
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Coercive Persuasion and Undue Influence