Is it safe to use a dummy ticket for proof of onward travel when entering Thailand on a 30-day visa?

The consensus among community members is that while airlines are primarily responsible for checking proof of onward travel, immigration officials may not always ask for it upon entry into Thailand on a 30-day visa. Several users mentioned their experiences where they were never questioned by immigration, but it is emphasized that airlines may deny boarding without proper documentation. Some users recommend using a refundable flight ticket instead of a dummy ticket to reduce risks, while others note the importance of understanding the immigration policies of different countries, as they can vary.