Some people do.
You hit the bottom of the rabbit hole when you are have a psychological crash due to some combination of dissociation, depersonalization, induced hallucination, and induced psychosis. I ve already linked to the allegations in the Kropinski lawsuit . And to the various personal stories , including my own , on TranceNet. Some begin TM and then quit again very quickly. They do not enter trance, therefore they do not act out the suggestions that they should become relaxed and have reduced mental activity, and they therefore quit TM practice entirely.