Porous Borders

There is some border surveillance as this Bangkok Post article attests.  Often wondered what percentage gets through.   

Years ago I was on a tour boat which drifted to the 'other side,' disembarked what appeared to be day laborers, then cranked up the engines to travel against the current to get back to the other side

Snorted some speed back in the eighties. When I realized how detrimental it was to my health, I quit cold turkey สกลนคร Sakon Nakhon