"The important thing to understand is that the egregore is formed by a group, but it can (and often does) take on its own volition."
It is for this reason that have avoided channeling. It seems way to subject to a parasitic nature, regardless as to the source it claims to be from. Have also been leary of invocations, bring forth a spirit or a god, is a dangerous adventure, that is not likely to go well.
As you can see from the above have practiced and studied Magick, but have been at least wise enough not to use it for my own benefit, that path leads to destruction.