It seems like you're talking about straight up abductions and slavery, which is illegal regardless of status of prostitution. According to http://www.humantraf

It seems like you're talking about straight up abductions and slavery, which is illegal regardless of status of prostitution. According to http://www.humantrafficking.org/countries/thailand http://www.humantrafficking.org/countries/thailand: "Trafficking victims in Thailand are found employed in maritime fishing, seafood processing, low-end garment production, and domestic work." By your logic Thailand should ban maritime fishing, seafood processing and domestic works.