Why Isaac Asimov was so right :)
Written by Walter Schreppers
According to Isaac these laws will fail terribly when put in practice:
1. A robot may not injure a human being or, through inaction, allow a human being to come to harm.
2. A robot must obey any orders given to it by human beings, except where such orders would conflict with the First Law.
3. A robot must protect its own existence as long as such protection does not conflict with the First or Second Law.
Well here is a little proof, even though the robot is intended to only shoot the pink toilet paper tubes at around 36seconds in this film it all goes wrong :
Now imagine a bot with real guns running around? This is why the military still keeps a human in final control of any weapon in case good old murphy's law happens :)