Funny story. Quite a few years ago, I came home to find my daughter had made a chocolate cake. Gorgeous. Sticky and damp in the middle. Mmm. I devoured a large piece and went off to watch TV with a cup of tea. An hour or so later, I felt VERY ill. Woozy and dizzy. Had to go to bed. When she returned home the next day, she enlightened me. Dope cake. I've tried smoking it and obviously, eating it. Neither agrees with me.
My bloke on the other hand, has smoked it for over 50 years. Held down a professional job for his entire life.
Yes, it can be dangerous for some. So can alcohol and fags. I've known many alcoholics unfortunately. They wreck lives, and not just their own.