Last week, a federal judge in Seattle sentenced prominent Canadian marijuana activist Marc Emery to five years in U.S. prison, after Emery pleaded guilty in May to one count of conspiracy to manufacture marijuana. For years, Emery ran a marijuana seed-selling business, the profits from which he donated almost entirely to marijuana policy reform efforts. For that reason, his prosecution by U.S. law enforcement has been viewed by many as purely political, a charge officials have since denied. But in…