It’s not too much of a stretch to think that robots like this could get so advanced that they might be a threat to humanity one day.
The Mechanical Hound slept but did not sleep, lived but did not live in its gently humming, gently vibrating, softly illuminated kennel back in a dark corner of the firehouse. The dim light of one in the morning, the moonlight from the open sky framed through the great window, touched here and there on the brass and the copper and the steel of the faintly trembling beast. Light flickered on bits of ruby glass and on sensitive capillary hairs in the nylon-brushed nostrils of the creature that quivered gently, gently, gently, its eight legs spidered under it on rubberpadded paws. Montag slid down the brass pole. He went out to look at the city and the clouds had cleared away completely, and he lit a cigarette and came back to bend down and look at the Hound. It was like a great bee come home from some field where the honey is full of poison wildness, of insanity and nightmare, its body crammed with that over-rich nectar and now it was sleeping the evil out of itself. "Hello," whispered Montag, fascinated as always with the dead beast, the living beast. At night when things got dull, which was every night, the men slid down the brass poles, and set the ticking combinations of the olfactory system of the Hound and let loose rats in the firehouse area-way, and sometimes chickens, and sometimes cats that would have to be drowned anyway, and there would be betting to see which the Hound would seize first. The animals were turned loose. Three seconds later the game was done, the rat, cat, or chicken caught half across the areaway, gripped in gentling paws while a four-inch hollow steel needle plunged down from the proboscis of the Hound to inject massive jolts of morphine or procaine. The pawn was then tossed in the incinerator. A new game began
http://www.secret-satire-society.org/wp-content/uploads/2014/01/Ray-Bradbury-Fahrenheit-451.pdf
Wow, this was quite a good read!!
It's pretty great, I like the part where the wife installs a 4th TV wall. He predicted not only mechanical hounds but also Virtual Reality and Bravo, in 1953.