If you can believe it, I've never done pot or any mind altering substances stronger than caffeine. Perhaps it's because I have an overactive imagination.
I know nothing about mind altering drugs but I have worked in a rehab. The job lasted about six months and it the hardest job I've ever had. I learned a lot of things, one of them is that marijuana is not always benign.
But even for those people who did become so addicted that it affected their ability to function, you could still draw a distinct line between a pot-head than even an alcoholic.
The first line is in the number of pot-heads. The facility I worked was a 28 day program, accommodated about 30 adults and 15 adolescents. Even though the clients didn't all come on the same day, in the six months you can estimate that I worked with 180 adults and 90 youth. In that time I only worked with two tried and true pot-heads. There were plenty of addicts that did drugs. In fact most had started with pot and moved on to the harder stuff.
This is why marijuana is often called a gateway drug. Pot is benign, give people a feel of confidence about using drugs. I think drugs are like sex for kids. Parents and society teach kids sex is bad to try to keep them for doing it. And it works until it doesn't.
But with drugs, kids are left wondering if their parents weren't wrong about the other drugs too. This is at my core belief why I think pot should be legal. Not only does pot give young adults a misconception of the dangers of doing drugs, getting it puts them in direct contact with the people who can get them the harder stuff.
Still, I've been under the misconception that all marijuana is mind altering. As it turns out in this article about a father who gives his son marijuana, that's not true.