I say Weir has a vastly overoptomistic view of humanity. Rapists would absolutely love a weapon that could render a victim unconscious quickly and reliably, as would kidnappers and terrorists collecting hostages.
I see a possibility for a whole series of crime stories. Larry Niven did something similar in the 1960s about the criminal possibilities of matter transmitters, like Star Trek transporters. Likewise, Vernor Vinge imagined the criminal possibilities of a field inside of which time stopped.