so man you are saying addiction of anything does not exist? because if we go by your example of "deserted iland", people will not fulfil any of their addiction but food and getting back to normal life.
btw, lack of self control = addiction .....
no einstein a person with such an addiction would not have withdrawal symptoms as would a person who was on drugs. Truthfully speaking the last thing on your mind would most likely be your beloved computer should you find yourself in such circumstances.