Why did the airline require a departure ticket for my entry on a DTV visa?

The original post discusses the experience of a traveler who, upon returning to Thailand on a DTV visa, was asked by their airline for proof of a departure ticket, which led to a community discussion on the validity and necessity of such requirements for DTV holders. Many commenters shared their frustrations and experiences regarding similar airline policies, questioning the need for onward travel tickets for those with long-term visas such as the DTV. The importance of understanding airline regulations and the inconsistencies between different airlines and jurisdictions were highlighted.