My uncle Ted lost his mind on LSD. He was an honor student in college and then dropped acid. Now, 30 years later, he has never held a job for more than a few years. A couple months ago he lost his job as a janitor and a few weeks ago he lost his job as a FedEx delivery man.
My friend dropped LSD and then was depressed for 2 years. Now he is bipolar, and whereas he used to be a happy-go-lucky kid, he now just acts weird in general and is plagued by meaninglessness.
My other friend got stuck in a trip for 2 years and was hospitalized in a mental health facility. She still has flashbacks and can't legally drive.
Many other friends have had bad trips. It's no fun having a panic attack and thinking you're going to die.
And pot, the least harmless...increases risk of mental illness 700%. If you are at all at risk genetically for mental illness, marijuana smoking can induce mental illness, even cause schizophrenia.
Notice that my user name is "WannnaSmokePot." I like pot. I'm just saying be careful. Drugs can fuck you up.