Almost the entirety of Asimov's Robots canon is a meditation on how the Three Laws of Robotics as stated are grossly inadequate!
https://en.wikipedia.org/wiki/Flight_control_modes
There are instances of robots entirely lacking the Three Laws in Asimov's works, as well as lots of stories dealing with the loopholes that inevitably crop up.
But in the story, when that was used on Zaphod, it turned out to be harmless!