Anyone who's taken it should have no problem understanding how easily this drug can create a disturbed state of mind. It has quite powerful psychoactive effects.
I do a lot of work with psychedelics. I'm very, very well aware of the power of consciousness-altering chemicals to have profound effects. That's kind of the whole point of using them. They should be respected but I don't see how that implies they should be feared.
EDIT: Phrasing