[tolbiny]

Male orangutans are very anti social- they are solitary most of the year and are only seen in roups during mating. They can be very territorial.
Domestication only occurs when animals (or palnts) meet many very specific requirements. Aggressive behavior (especially in territoriality) is nearly always a deal breaker and is seen in many of the apes.
If your interested in more info on dometication there is a good chapter in "the third chimpanzee" - which is an excellent book in many respects (written by the the "guns germs and steel" guy.