> not some scary poisons and 'chemicals'.

I dunno, DHMO is pretty scary, but not as scary as the naturally occurring pesticide 1,3,7-Trimethylxanthine [0], which has become the world's most widely consumed psychoactive drug despite side effects of anxiety, nervousness, irritability, restlessness, insomnia, headaches, and palpitations.

[0] http://www.wolframalpha.com/input/?i=1%2C3%2C7-Trimethylxant...