What should I expect when arriving in Chiang Mai with a DTV visa?

Arrived at Chiang Mai airport this afternoon, 3rd entry on my DTV. Sawadee kaa, immigration lady pointed to the finger scanning machine, no questions asked, and gave me a 180 day stamp. No need to show a tdac or DTV visa, it was all in their computer.

Meanwhile I saw several people in the queue in front of me getting a grilling about how many days stay, hotel booking, and onward flight. One guy was getting interrogated for a long time about his “friend’s” address where he was staying in CM, why he was coming for short frequent trips, whether he was working in Laos, and whether he had a Thai wife.