Please everybody, everytime you step outside your residence, even if you go down to the shops to buy milk, please go to immigration and ask them if its necessary to report. They may get the hint that things are a bit ridiculous. I reiterate, My experience is on metv i have been told by two seperate people at jomtien that no need to do tm30 after border run. But I can appreciate anything can happen at all including fine for not reporting after buying milk.