The Three Laws

Are the three laws of robotics adequate? I believe the three laws that Asimov created would not keep robots safe. The robots could still be taken advantage of by humans. The boys in The Bicentennial Man were given Andrew orders to destroy himself. Also the laws can be interpreted differently and therefore could cause harm. In the movie I, Robot this is exactly what occurs. V.I.K.I stands for Virtual Interactive Kinetic Intelligence and controls the uplinks to all the NS-5 robots. She interprets the three laws in her own way and this causes harm to the humans. The three laws from the movie I, Robot and The Bicentennial Man do not seem sufficient enough and may need to be revised so interpretation can not come to question.