I'm willing to bet that you haven't got a damn clue how LSD works. The exact mechanism is uncertain, but it temporarily alters the brain's serotonin system to produce hallucinogenic effects. No, it doesn't make your brain bleed, or form crystals in your spinal cord, or any other bullshit urban legend. The theraputic index (ratio of active dose to estimated lethal dose) is so incredibly high that it's one of the least toxic drugs (of any kind, not just psychoactive) known to man. Educate yourself, dammit.