I came across an interesting news story this weekend - some stunning results from a recent study. Researchers at the University of California at San Diego have discovered that sleep-deprived teenagers are more likely to smoke marijuana. Ah, duh. My question would be which came first, the weed or the lack of sleep? But that wasn't the point of the study. Nope the point or main finding was if a teen was sleep-deprived and smoked weed then so did members of his social network. You've heard of the Kevin Bacon six degrees of separation theory? With weed, the network's even smaller. In the UCSD study the level of influence was four degrees of separation. Of course if these guys got together to buy their snack foods they could save a bundle on buying cheese doodles in bulk. But at the centre of the study was influence and influence over negative behaviour. The most popular teen in the social group could influence his frie...