You have both border immigration and in-country immigration, and both conduct checks. In-country immigration is known among expats for sometimes carrying out home visits (mostly for marriage visas) and inspections at schools/business sites (for student or business visas). Immigration already performs such checks for other visa types, so why wouldn’t they do the same for the DTV? The people mentioned could also be stopped at the border, yet authorities still "spend time and money" to conduct in-country checks. DTV is a new visa, and things can change very quickly...
Anonymous participant No idea on consequences as it is a new visa and checks aren't common for now. You may check what's done with ED visa holders (students). They used to check classes attendance and they just have announced some stricter measures these last days in the news.
Great to hear you're working for thai immigration and already know everything about Thailand. Have you heard about the schools getting checked when you're under an ED visa? Well that's happening! And yes, it has been reported by DTV holders for some Muay Thai schools here. I'm not the only one saying so apparently...