Tolerance... You might get a hang over form 4 drinks just as someone might get a hang over from 4 drags, or 2 bongs, some people even get sick immediately, just like alcohol. Not sure what you're trying to say or prove, weed is a drug and it has it's side effects.
This is one of the reasons why, whenever it's come up in conversation, I've been advocating for the complete legalization of weed for the last 16 odd years. Then maybe some proper studies can be done and we can get rid of all the propaganda surrounding the subject.
Was all over my complex, but then its always all been over my complex so nothing new really. I think the people who smoke will just not be as paranoid anymore I doubt there is going to be a surge of new smokers. I grew in the past but never smoked, now i'll just grow for fun but still wont smoke.