I know of about 25 people who started smoking weed aged under 16. 10 years later, and 4 of these still smoke every day, while another 5-6 have a little dabble now and again. None of them have ever used cocaine or heroin, and only 3/4 used ecstasy for a small period around the age of 17/18. This proves you wrong. The fact that you are unaware of the potential differences in strains of weed tells me that your not as well informed as you think about this subject. Apparantly: 50% of 16-29 yr olds in the UK have tried pot at least once. (2011) Skunk is the common strain (GM – with 5 times more THC) In the late 90s less that 10% of pot was skunk in the UK, while in 2010 80% was.