If cyanides can be sold freely without the need to report a buyers details what other potentially lethal poisonous chemicals are currently unregulated?
I think it might now be a rarity with reducing numbers of turtles. When roamed the beaches of neighbouring Malaya fifty odd years ago turtle nests were abundant. Now, they are protected species yet locals will plunder any they find.
Yes, the Karen have lived there for multiple generations and treated poorly or ignored by successive governments. They, more than the modern residents know how to manage forest lands. Leave them to settle, they are part of the scenery.