Schools hiring with no work permit

Just think about this for a moment. You, A random foreigner, shows up at the police station or the immigration office to complain about a school. You've been in that town for maybe six months or year. The director of that school has been there for many years. The person who hires the foreign teachers has been there even longer. The immigration officers and police officers may very well have children who attend those schools. And it certainly not beyond the scope of imagination that someone is paying off a few of these officers to make sure that the school stays out of trouble.

Think about that for a moment. It may be you who gets into more trouble than the school. And, as Scott mentioned earlier, it's unlikely that anyone will take anything you have to say seriously.