His experience is common, according to Fair Trials International, a legal charity, which says that drug-related arrests have increased rapidly since 2006, when the laws changed in Dubai so that trace amounts of banned substances picked up by airport detection equipment were deemed to indicate possession. “People are being subjected to very thorough searches,” said Saima Jirji, a solicitor at the charity. “Even seams in their clothing and the fluff in their pockets is being checked.”