The British medical journal Lancet has ranked drugs based on their danger to human health.  The results - for people interested in facts - are not surprising.  Notable quote:

Heroin and cocaine were ranked most dangerous, followed by barbiturates and street methadone. Alcohol was the fifth-most harmful drug and tobacco the ninth most harmful. Cannabis came in 11th, and near the bottom of the list was ecstasy.

How does this relate to MMA?  Not a lot, but insofar as athletic commissions and members of the MMA community believe the lies that marijuana is a drug that is harmful and should be tested for, I hope they come across this information.

Nick Diaz and Diego Sanchez are superb athletes.  They know what they're doing.  They do not need to be fined or suspended for using marijuana.  They do not need to be punished.