Originally Posted by
Transpacificflyer
Immigration has been logging all denied entries and deportations for several years. In Thailand, they don't need a legal reason to block someone from entering.
They can simply deny entry at Swampy and that's it. I don't know how one can miss the fact that a page has been ripped out of a passport since it is reinforced paper and just doesn't neatly rip. The carrying airline checks passenger passports at checkin and that includes flipping through the pages. The missing page can be overlooked if it is neatly cut out, but that doesn't suggest an upset rage event does it? Whatever the reason, it is advisable to verify your status at the local Thai consulate. If on the black list, they can tell you. A green light doesn't mean there won't be a problem, but it does suggest there won't be.
Ubon Joe over at TVF is a useful resource, but they is sometimes inaccurate . Keep in mind that these are not practicing Thai immigration lawyers. Sorry, but I agree with investigative journalist Andrew Drummond's sentiments about TVF. Flyer Talk is a far more reliable and trustworthy source of information

Both statements are not correct. At a non air entry point they can simply deny entry and send back, at an airport they have to state the reason and explain themselves, since there can be quite hefty bills for the passenger and/or airline.