Anonymous participant 853 be prepared for DENIED entry next time. There's a crackdown on those who use both the visa exempt entry and tourist visas with 30 day extensions to live and work in Thailand.
Anonymous participant I can assure you that any flight ✈️ from the USA will require the flyer to show PROOF of the Thai Visa or Visa Exempt Entry for entry into Thailand. IF visa exempt entry, the airline wants to see your flight departing Thailand within the number of days you are stamped into Thailand. And there's others who have had the same question asked on check-in in other countries.