It also rates the smoker of a packet of Benson & Hedges more dangerous to others than someone who's just tooted five lines of Coke!!
Where did that graph come from - the harmless bloke on LSD?
Qat/Khat - about, what, a 1% risk of harm to others?
Bollocks. Half the African machete wielding limb-loppers are off their tits on the stuff when they go on the rampage!