@Dak***
, the way it works is they're going to question you about your extensive visa exempt entry history to thailand on visa exempt entries and ask if you're working here illegally. Then they'll ask for proof of adequate funds (20K baht in cash or the equivalent), then they'll ask for proof of onward travel, and then a confirmed hotel reservation or lodging.
If they want to they'll deny you entry and it will be up to them whether they let you go to another country OR make you go back to the country your passport comes from. You would be held in IDC lock up at the airport until you can buy your ticket back to where ever they let you go to.
Denial of entry is NOT being deported (you have to have stamped into the country to get deported). It is NOT blacklisting either, it's just being denied entry. You are free to get a visa, or try to enter by a land border.
I know people who were denied entry at Suvarnabhumi who were allowed to fly to Malaysia and then entered the country with no problem by the southern land borders.