But that would be untrue. Each airport and each border have different requirement (some a lot, some little, some none). General out of context advice is not helpful to OP situation at all.
The border bounce was most likely done in Cambodia, not Laos. The two famous Laos border run (from Nong Khai and Mukdahan), ask nothing on either side. I did my 2 border bounce this year (did 15 over the last 12 years in these border) and never got asked anything. If someone like me never get asked anything, nobody else does.
Yes, that's the re-entry permit room. These are not interviews. There are 2 booth inside and sometimes they will ask foreigners to go there but it's never with intent to potentially denied you.
You mean foreigners at the front of the line? No idea why they told u that. I crossed Nong Khai and back a few days ago. Ive crossed that border maybe 20 times, never asked any question.
This isnt the head of department, its the re-entry building on the left before crossing over. They do that depending on your nationalities or stamps history, its procedure because their technology suck at the border. Its not an interview per se, you will get accepted in.
Yes, I know, but for the first 7 years I did the 30-30 or 60-30. I stopped entering from BKK airport in 2017. If you stay up to date you wont get rejected in. And in BKK if you contact an agent before end you get into the privilege or wtv line for 5-10k baht and be 100% accepted in. A lot of people whose passport is full do that while entering from BKK.