Is it unethical to design robots to resemble humans?

Three men deliver an endless assault of kicks as the victim lies motionless on the grass. With venom in their eyes, one of the perpetrators delivers a crushing blow with a wooden bat. Another gets down on his knees and delivers a flurry of fists. Plastic parts and microchips are strewn across the ground. So goes the scene in Mike Judge's cult classic film Office Space, which is a cathartic release from the constant indignities of the modern worker.