your brain also does some hallucinating all on its own;
it's worth noting that people who allegedly go on "permatrips" are often just experiencing panic disorder (they get panic attacks) when they think about their bad trips and remember that feeling of being out of control
Most permatripped brain-fried tards were stimulant users who burnt their brains out, or from neurotoxic contaminants in street-quality drugs. If drugs were legal and created by pharmaceutical companies, there wouldn't be those contaminants