Is it dumb to trust smart technology?

Did we learn nothing from Arthur C. Clarke's 1968 sci-fi epic, 2001: A Space Odyssey?
In the film, astronauts on a mission to Jupiter discover that the HAL 9000 artificial intelligence computer that controls and automates all functions on the spacecraft starts seriously glitching. The astronauts get worried, HAL gets paranoid -- yada, yada, yada -- HAL kills everyone on the ship.
The moral of the story is that when lives depend on fully automated systems, it's a good idea to keep an eye on thos