"Record numbers of teenagers are requiring drug treatment as a result of smoking skunk, the highly potent cannabis strain that is 25 times stronger than resin sold a decade ago.
...
A decade after this newspaper's stance culminated in a 16,000-strong pro-cannabis march to London's Hyde Park - and was credited with forcing the Government to downgrade the legal status of cannabis to class C - an IoS editorial states that there is growing proof that skunk causes mental illness and psychosis.

The decision comes as statistics from the NHS National Treatment Agency show that the number of young people in treatment almost doubled from about 5,000 in 2005 to 9,600 in 2006, and that 13,000 adults also needed treatment."
http://news.independent.co.uk/uk/health_medical/article2368994.ece
linked from http://sandmonkey.org/

I still think they should legalize all drugs.
If people can willingly vote for Kerry, why shouldn't they have additional avenues to be psychotic?
But I do think people should aware of how dangerous it can be.