i knew you were dutch when you said wauw in stead of wow..
I don't see how cannabis can be so high in terms of harm to others, is that because of second hand smoke?
But cannabis by itself doesn't need to be smoked you can eat it as well.. i just don't see how cannabis can be a causal factor of violence or even traffic accidents or whatever, i think that's more the person using the cannabis rather then cannabis being a factor in that.

Me myself quit drinking alcohol when i was 17 and quit smoking weed when i was 24, now i'm completely drug free.