interesting thread... thought I'd add my two cents worth...
interesting that in nine whole pages nobody has mentioned that cannabis is a hallucinogenic agent, and even though it is not considered as potent a hallucinogen as LSD, it is still hallucinogenic... fact...
becuase it is an hallucinogen, it alters the perceptual reality of the user... while this is exciting and amusing in small doses for the regular user, for those with no experience of drugs this can be quite frightening, although the negative experience wears off pretty quickly, the bad experience can potentially trigger any underlying psychotic and anxiety disorders a person may have... fact...
cannabis is no good to you if u have a mental illness, unless ur illness is depression, the daft happiness which comes from smoking weed seems more effective that antidepressants in a lot of cases... but if u have any kind of psychotic disorder, watch out, as, for instance, if u hear voices, it makes the voices stronger and more forceful... if you get very paranoid, again, don't use cannabis as it will make things worse.. if u have bi-polar disorder, again, cannabis shouldn't be something u use, as its use can trigger manic episodes... fact...
beyond that, is cannabis dangerous? well, here the arguement divides the camps...
young ppl in the UK who use a lot of cannabis are reputedly using a lot of skunk, and this skunk is a.k.a superskunk, and reputedly around 60 times more potent than the grass which was smoked by the hippies in the 1960's... a lot of young ppl in the UK are becoming psychologically dependent on cannabis, and there are many reports of moody teenagers who start smoking weed, seem mellow while they're on it, and when they can't get their hands on it are far more violent and moody than they were before they started using...
personally, I think the reason for this is.... cannabis activates a lot more than pink eye and "the munchies"... yes, ppl have endogenous cannibanoid receptors in their brain, and these receptors are not activated until u start smoking weed... when u do start smoking weed, the high is similar to the release of endorphins, and things that would normally make u as mad as hell dont seem like such a big issue... however, when u take the feel good substance away, the anger, the agression, etc, that would normally be played out and dealt with in ur daily interactions is suddenly unfurled, and because ur brain chemistry has been altered by an artificial agent it takes a while for your brain to right itself again chemically, and so u find it difficult to process the normal angers u have, and so, without weed, the hippie is an aggressive moaning type for at least two days... this too, though, should subside, if the person uses less weed less often and takes regular days off...
as we know, perceptual hallucinations do not just involve the senses of sight and sound and touch- perceptual distortion also effects other processes, such as spatial awareness, so if ur stoned u shouldn't drive or operate heavy machinery... the IQ of potheads is generally statistically at least five points lower than non-pot heads, which is fine if ur a genius, but if ur barely average its a problem... potheads also suffer from memory loss (and if thats ur problem, then regularly dropping ginko biloba should fix that), and they also suffer more upper respiratory tract infections if they smoke it... (dropping vit C and trying other methods to imbibe might be useful here)...
...if you have a lot of data to input, or a lot of mathmatical formulas to calculate, then smoking weed while doing such means that u'll be more clumsy, u'll mentally go off on tangents, and the work will take a lot longer, yet if ur a creative type, then having a spliff while ur knocking out a rough outline for a new book is great... u will later have to go back and check sentence structure and grammar when ur straight, though...lol
so, all in all, I don't view cannabis as especially harmful in the great grand scheme of things, the problems with pot only arise when
there's a drought
ppl with some mental health problems smoke it
u are greedy
beyond that, I know of many social workers, teachers, policemen, office managers, and other similarly fine upstanding members of the community who smoke the stuff, hold down jobs and are good parents...
drugs are inert substances... they are not dangerous until u mix them with idiocy, insanity or immaturity...