I gotta say, I'm kind of tired of stories like this and then the parade of 'whatcouldpossiblygowrong' and 'thiswillendwell' and all the comments talking about how this is the beginning of Skynet.
You know what's going to happen from this? Two little robots that look like RC cars will act out a prescribed game of hide and seek. It will end just fine. Nothing could possibly go wrong. There is no way that the deception which is 'taught' to these robots will end up magically transferring itself to our cell phones, computers and toaster ovens. Self-checkout counters will not begin to suddenly shave pennies off transactions.
Of all people, the readers of slashdot should know that. I know it's fun to joke but people here seem to be taking the joke seriously.