12. Meanwhile, prohibition pushes some people to try legal highs like these - which genuinely are dangerous.
Across Europe, legal highs are introduced at a rate of about one a week. Unlike established illegal drugs such as MDMA (the active ingredient in ecstasy), these chemicals are poorly understood, which means that nobody knows the right amount to take or what the possible side effects will be.
Last year, 52 people died after taking “novel psychoactive substances”. That’s more deaths than MDMA has caused in any year since 2005. And in all likelihood, a hell of a lot more people take ecstasy than take this stuff.
13. Actually, the case for legalising some drugs is probably stronger than ever.
This is in Colorado, where cannabis is now legal for people over the age of 21 to buy, providing that they smoke it at home. A study conducted last year by the University of Essex put the potential savings of introducing a similar system in Britain at £360m, even after accounting for an increase in use of 15% as a result.
There is much less of a case for legalising cocaine or heroin - which are far more harmful. But in other countries such as Switzerland, the Netherlands and Canada, long-term heroin addicts are prescribed heroin to inject under supervised conditions: a policy which has all but destroyed the illegal market in many places.
Meanwhile, most of the scientific evidence shows that some recreational drugs such as ecstasy are still far less harmful than alcohol, which Brits still consume vast quantities of.
Sadly, our politicians would prefer that a third of the population remain criminals.
Both David Cameron and Nick Clegg have in the past backed liberalising drug laws. Indeed, Cameron served on the Home Affairs Select Committee in 2005 when it suggested just that. Back then, the wannabe Tory leader had to answer some awkward questions about his own drug use.
Unlike Clegg, Cameron has been fairly quiet about it recently.
In 2012, David Cameron rejected a call by the Home Affairs committee for an inquiry into British drug policy out of hand, arguing that drugs policy in Britain is working. Logical huh?