That is the dicey part of living in Thailand. There is always that thought in the back of your mind you might suddenly have to leave because of some lame bull$hit. I gives real confidence in those wanting make any investments here. Have to love the backwards logic. Would drive any Vulcan mad.
Just a typical Thai trying to save face unable to speak good enough English to explain himself. Aka ( I don,t know how to do it) , ( i don,t want to do it.) , (boss angry I do it) , or you , you, give me money. If more foreigners stood up to paying bribes and extra fees for parks etc this would all stop. Just learn how to say NO! and don,t worry about your partners feelings because YOU stood up to them. Remember it is always YOUR fault for discussing the issue. Not the person trying to screw you over.
As long as foreigners continue trying to work around Thai Immigration laws the laws will just become more difficult for everyone. Seen it happen time and time again.