As a person that has done and seen a lot in the marijuana scenes, on and off for many years, I am of the opinion that it is not addictive for the vast majority of people. If you look hard enough, you can find people that are "addicted" to M&M's candy.

To equate marijuana dependence with heroin addiction is preposterous. If they were similar, we'd hear about people committing crimes to get the money to buy it. I'm not saying that it has never happened, but I've never heard of anything like that.