No, it isn't a "Gray zone" at all. You're breaking Thai law and contributing to a negative image about foreign workers in a country that already has stringent immigration laws.
So as someone doing it the legal way and jumping through the hoops created to catch people like you, I'd just like to say FUCK YOU VERY MUCH.
So as someone doing it the legal way and jumping through the hoops created to catch people like you, I'd just like to say FUCK YOU VERY MUCH.