From a pro-drug legalization oriented site (that has very good user-friendly advice for those who do/plan to dabble in the illict):
Cannabis is nowhere near as addictive as nicotine or alcohol but it is wrong to say it is not habit-forming.
Many users compare their daily cannabis habit with dependency on caffeine. The UK Department of Health summed it up neatly: "Cannabis is a weakly addictive drug but does induce dependence in a significant minority of regular users."
Around 9% of users become addicted (1), although some studies estimate that over 50% of users have "impaired control" over their use of cannabis. Of the 70 million Americas estimated to have tried the drug, around two million use it daily. (2)
...
withdrawal
If you are a regular cannabis smoker (every day) and you stop smoking, you will experience some of the following withdrawal symptoms: restlessness, irritability, mild agitation, insomnia, nausea, sleep disturbance, sweats, and intense dreams. These symptoms however are mild and short-lived, lasting 2 to 4 days. (3)
Cited Sources:
1. MARIJUANA and MEDICINE: Assessing The Science Base, pg 95
2. Lynn Zimmer, co-author 'Marijuana Myths, Marijuana Facts',
New Scientist online interview, 1998
3. MARIJUANA and MEDICINE: Assessing The Science Base, pg 90-91
Source:
The Good Drugs Guide
Just because you're not puking your guts out as one who quit a heavy heroin/cocaine habit would doesn't mean that you don't experience withdrawl symptoms. I'm a big drug-use proponent in the sense of their responsible and informed use. I have seen enough people not do so well with the whole quitting cold turkey thing to know that it ain't this quick and easy thing for everyone (although it was for me).
And on another subject, anyone trying to argue the merits of marijuana in comparison to other drugs is entirely missing the point. No matter how good your arguments are for pot on the merits you're citing, it won't sway a soul who makes the actual decision to legalize it (unless there's a voter-based initiative, which there really don't tend to be on the federal level).
Arguing like you are is like arguing for or against the presence of WMDs in Iraq as far as the war's legitimacy is concerned. It just ain't a productive line of argument, because it's just a smidgen of the actual issue. This isn't a public health debate, and many of those who phrase it as such actually believe that the government is using those ads because they are indicative of what they actually believe, rather than an effective tool at undermining public support for marijuana initiatives.
The amount of politicians who have smoked it, after all, is rather large. And pretty-much the only people who get taken in by the propaganda are young'uns, because the folks in government lived through the 60's, and know that it wasn't a time of prolific accidental hippie-hippie shootings, forced sex (free love, not ****, you know?), or drive-thru hit 'n runs. And if you think that Bush buys into the drug propaganda, HA! The guy was a coke head, 'this is your brain on drugs' remember?
Point is, arguing about WHY it is, and whether the government propaganda are true are two separate issues. Yaboosh is really on the right line of discussion, the rest of this seems to be two different camps in high school battling out over who has the most second-hand knowledge...