While Just Reener makes a valid point for freedom of speech, the issue is the training method used.
I have known countless people involved in LGATs, cults, sects, extreme groups... most have short term benefits, long term nightmares.
However, rather than blame the LGAT, I would recommend confuddled examine what would cause your loved one to get involved there in the first place. Something i
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Large Group Awareness Training, "Human Potential"