@Alex ********
actually it is a very fair policy, allowing "tourists" to come and go without issue. You can come in and out unlimited, as long as you are not trying to live in Thailand as a "tourist". At some point an IO will suspect or decide you are trying to live and will warn or deny entry. For example if you came for 30 days and left for 30 days multiple times a year(as some workers do) no problem. They may let that go on for who knows how long.But of you enter and extend for 90 days and then bounce out and back again... they think you are trying to live in Thailand and probably are.