Best way is to get a bloody Thai Gf, she wil teach you..... Only need the phrases for arguing anyway, they are easy to learn... The rest is same same but different.
I can speak from my own experience with a very angry Thai ex girlfriend, she reported me to immigration, the embassy and the local police station for working online here for years without a work permit. The reaction of the officers was either laughing or said Mai pen Lai.
As long as you don't interfere with Thai business or economy you are not doing anything wrong.