Another strange thing (to me) is the complex dependency between institutions. In order to be able to apply for various things like documents, benefits, scholarship, school admission etc. one needs approval from head of family then head of the village, then letter from the police and so on. Be on bad terms with any of these (individuals) and some government services are unavailable to you. I heard a story from and Indonesian about how he could not go to university because the head of the village didn't want to give him the letter that he needed to apply to university.
Also marriage between members of different religions is not possible. So one person must convert to the other's religion before they can be married.