*EDIT* - As some of you seem to lack the ability to read, I'll write it again here. This post was for INFORMATION only of an experience, that's it. If you want to argue, please do so elsewhere.
Just wanted to share my experience at BKK this afternoon - I have the DTV for workcation (online business) and have been travelling around South East Asia for the past year or so and have many stamps in and out of countries. The immigration officer (female) initially scoffed at my visa and I was escorted for questioning - after completing a passenger statement & a conversation with a very nice/polite immigration officer (male) I was allowed to continue into Thailand as normal.
He advised me that DTV holders should only stay for 3-4 months, not the full 6 months each time, as people should use the visa for travel.
UK passport holder - travelling in a couple (only female took for questioning not male).
Travelled from Vietnam to BKK (many others in the immigration holding also seemed to have travelled from Vietnam too).
*This is for information of my experience only - this group has a habit of fear mongering unfortunately but if you have the visa for the correct purpose then you should have no issues.*