The outer Badui's grandpa, for baduian/badui people it's forbidden to use electricity and electronic equipmentsThe Baduis also observe many mystical taboos. They are forbidden to kill, steal, lie, commit adultery, get drunk, eat food at night, take any form of conveyance, wear flowers or perfumes, accept gold or silver, touch money, or cut their hair. Other taboos relate to defending Badui lands against invasion: they may not grow sawah (wet rice), use fertilizers, raise cash crops, use modern tools for working ladang soil, or keep large domestic animals. Due to their rigid taboo system, the Baduis have remained very backward even in modern times.
source: http://en.wikipedia.org/wiki/Badui
