If your country has a good and clear DTA with Thailand, you pay only tax in one of the two involved countries, without DTA you might end up paying tax in both countries. Also with DTA it is possible you pay tax in both countries, but added together it most times then will be the highest of the two involved tax countries.
Anonieme deelnemer 724 It is at exactly 180 days, not 183, you might be confused with some other country. Having or not having a bank account does not influence taxabilty.
It is up to people if they want to be treated, if they want have money or insurance. If they don't want, just up to them. And 72 hrs will normally cost 50K to 60K THB, far from 250K USD.
Rules did not change, only the guidelines for border immigration officers changed to focus on tourist behaviour, especially for visa free entries.
DTV is also a tourist visa, so behaviour also might be checked, just read the official publications and you will see measures are MAINLY intended for visa free entries. but that does not exclude other entries.