'WHEN science fiction writer Isaac Asimov developed his Three Laws of Robotics back in 1940, the first law was: "A robot may not harm a human being, or, through inaction, allow a human being to come to harm." ... reports out of Korea of newly developed guard robots capable of firing autonomously on human targets are raising concerns about their potential uses. ...'.Roger Clarke wrote an article "Asimov's Laws of Robotics - Implications for Information Technology" for IEEE Computer Magazine in 1993.
There are already some domestic robots available which could raise safety concerns, even if not designed to deliberately harm people. Professor Rodney Brooks, Director of the MIT Computer Science and Artificial Intelligence Laboratory, gave a talk in Canberra last year about the potential for low cost robots.
The Roomba robot vacuum cleaner he talked about and the Lego robot kit are examples of low cost robots and kits available.