I can see it now: just get the enemy to breathe in a cloud of nanobots, or have the bots enter their body through an open cut that they make, and the enemy’s body is yours: no violence needed.
We live in a terrifying time because there’s just no way to dodge this sort of stuff unless you have the EMP tech, since a Hazmat suit is unsustainable to don long-term.
the borg, replicators(milky way) all use nano-robots as a method to attack thier intended victims, or assimilate them.
its actually the basis of borg assimilating a planet, deploy cloud of nanoprobes into the infect the population through the atmosphere, they dont seem to do it often though.