@James *******
Dont know what happened 40 years ago. But have been making the Tekileck / Mae Sai crossing monthly until covid, then the war, for over 20 yrs.
Know many Burmese on Tachiliek side with family here in Chiangrai.
Any trafficking would be on river border FAR to east or west of crossing.
Both Thai ( and Chinese )
patrol border from Santikiri ( Mae salong to Mae Hong Son.