@Bart *************
You seriously get asked extremely rarely by immigration. But people her in this forums claim: "oh, they never ask!" Because they had three flights and did not get asked. Immigration can deny you entry for what ever they want. And they do not even need to tell you why.
That attitude is like approaching a traffic light with a little bit to high speed and just stopping just in time. And the police officer sitting there on the chair says in his mind: at least he stopped.
And is not asking for the driving license.
Have one of your blinking lights damaged in this situation, he would stand up and walk over, and tell you: your blinking light is damaged, get it repaired. Perhaps he still is not asking for the driving license, but perhaps he is.
Considering how simple it is to come to Thailand and how complicated it is for a Thai to get a Schengen visa for Europe, I most of the time shake heads. :D