The following advertisement, paraphrased for brevity, is currently running in the US state of Colorado, and in slightly edited form across the entire United States: "Needed urgently, 64 tonnes of marijuana, FOB payment $84.48 million, completely legal, opportunity to build business 50-fold." The question is whether Thailand should answer the advert, and further, should Thailand sue the United States at the World Trade Organisation when Washington gets all huffy that another country's farmers and traders are trying to horn in on its developing drug trade. The US movement to legalise "recreational" drugs is well under way. The states of Colorado...