While horse meat is as palatable as beef there has been concern that a veterinary drug given to horses that can be dangerous to humans.

WSJ: U.K. Arrests Men in Horse-Meat Probe

As well as posing physical danger, might robots also be dangerous to humans in less direct ways, by bringing out their worst aspects, from warfare to paedophilia?

ECONOMIST: Robotics

The robots could be sent into areas that would be dangerous for humans to enter because of high radiation levels.

FORBES: Connect

Current applications for Superbot are being developed with space exploration in mind, but Shen said the technology could be usefully applied in any environment dangerous to humans such as for search and rescue tasks in mines or underwater -- although the laboratory is still working on a morphing robot capable of swimming.

CNN: Robotics discovers its soft side

These small planes, which can be controlled by a computer inside the vehicle or remotely by a pilot, are increasingly being used by the military to perform missions that may be considered too dangerous for humans, such as wartime reconnaissance or combat missions.

FORBES: UAV Makers Attract M&A Interest Despite Defense Cuts