@Viola *******
That's wrong, Miss
@Viola *******
. A denial of entry will get recorded in the Immigration Central Computer, but it does not automatically result in a "blacklisting". It however results in what we call "flagging".
A blacklisting would mean that you are banned from entering Thailand for a specific period of time.
However, we were talking about a denial of entry at the border, and the reason given was “overuse” of visa-exempt entries. It means, that after a certain period having spent outside of Thailand, you can enter again, if you hold the correct visa for your specific purpose.
And in other words, if you get pulled aside and questioned, and they can decide to allow entry, however if they do so, it gets accompanied with a warning that for the next time you need a proper visa for the purpose of your stay. In this case, you will get "flagged" in the Immigration Central Computer.
Each time an Immigration official scans your passport, your personal page will come up, and your record will show that you have been warned.
We call this "getting flagged". This is what your "personal page" will look alike, and in the lower left corner there is a box into which your "flagging" will be noted!