I've heard of people in Indonesia(Bali) getting caught because they post in public Facebook groups about the work they do, like "Hey guys I'm a yoga instructor/web designer/surf teacher/English teacher and I'm available for hire!"
Thats interesting. I would also find it interesting if they distinguished between e.g. yoga instructor/surf teacher since they are working locally (sounds pretty illegal to me) and remote work like web design. Has anyone further info?