Customs will still get you for duty my wife brought lot of clothes back and got charged 20k baht i knew a case where some work mates wives gathered together loads of clothes might even have been childrens clothes to take to thailand to give to thai charities they were still charged import tax fgs
You have to be careful on departure if the gate is over there to allow plenty of time to walk to the train you need to catch to get to your gate its quite far before gate closes...i nearly came a cropper by that
They opened up the country to loads more countries as well in the deluded thinking it would create more income wealth without thinking about the massive influct of visitors it would cause