Tell me something I don't know, most Thai people are harmless, it's the few who would murder you in a heart beat that you've got to be wary about. As for the back packers that were murdered on the island, it wasn't the two Burmese guys, they've been proper scapegoated, Koh Tao is run by five different local mafia gangs, Hannah & David where no doubt murdered by a couple of these gangsters, who knows why, could of simply been the two pissed them off, or the thugs wanted to rape a pretty farang girl, and had no qualms to kill them both.