Visa status is very important. You entered on a tourism visa/exempt hence you were required to sign a waiver. Had you been on a non-immigrant visa this would not have been required
***sigh***Ok. So your original post was misleading. You gave the impression you were on a non-immigrant visa, whereas in fact you were nothing more than a tourist. Why didn't state the FULL FACTS in the first place?
What you said is totally misleading. If you had to sign a waiver you were duped. But don't worry, you're not the first and certainly not the last who doesn't understand how visas work
I was merely pointing out that people living in Thailand on non-immigrant visas have NEVER needed to show outward bound tickets. It's only those on tourism-based visas/entries who are required to do so. Your answer was not really relevant to the original question