@Mark ******
everyone's experience is different, but unless Thai authorities have specifically requested Airlines not to refuse boarding to their country, it's nothing to do with "how vital tourism is to the Thai economy". Airlines have a legal responsibility to make sure that passengers have the means to fly home again, should they be refused entry upon arrival at their destination. That 'means' as far as they're concerned is a ticket to leave the destination country, whether it be to go home, or to go to a second country. There's no "scaremongering", there's no reason or motive for that, just different experiences, whether that be first hand, second hand or whatever.