The BBC put out this warning for tourists going through Thailand: Tourists warned of Thailand airport scam that warns people to be careful when wandering in the dutyfree shopping area and a scam using a the store, the police, and a translator who will try to scam you into paying thousands of dollars to be allowed to leave the country in spite of a suspicion of "shoplifting".
Just the Flight has put together a nice infographic: A pretty useful guide to preserve your money against scam
