Well you clearly didn't try. It's not hard, just stop doing it. I know hundreds of smokers, all of whom can stop smoking weed whenever they want for however long they want. If that doesn't clue you that it's not addictive, I don't know what will. Example: Hey, I have finals in a month, time to start to buckle down and get to work. And just like that myself or anyone I know can stop smoking weed for a month or however long is necessary. Should I generalize this finding to all people? Of course not, but you'd certainly be in the minority if you got addicted to weed. For comparison, take the same case with a heroine or cocaine addict. Do you think that person would be able to just stop doing it cold turkey for a month? No chance.
Oh, and you quit doing heroin by yourself? Really? So one day you just said, "hey this is bad for me I should stop"? If that's the case then you weren't addicted, you were a recreational user; don't get the two confused. Bring me a real heroin addict who had to go to a methadone clinic to break the habit and I'd like to see them tell me that quitting heroin was easier than quitting weed. Just as I shouldn't make general statements about the part to a whole, you also shouldn't, especially when you don't have all the info.
Before you question whether or not I have the "info", you should know that I have spent years studying addiction and work for a non-profit addiction/recovery foundation.
Regarding my last post, I should have responded different. Due to the nature of my work, I was angry with your arguement and didn't take the time to properly build a defence. Instead I used a self reference and should have kept my personal battles (which was an addiction and not casual) out of this.
I never argued that marijuana is less addicting than herion, I was argueing the psychological aspects of addiction far outway the physical. Anyone informed in the subject would agree with this statement (and I'm sorry, siting High Time does not make you informed).
And for the record, methodone is a stronger addiction than heroin with a harsher/longer physical withdrawl. It's just "safer" in that its government regulated.