Only a man bent on suicide would continue attacking someone who has "technical mastery" over him.
William, it is fortunate that we live in a world in which such an illogical tactic would never be employed -- whether with 'Firearms, Nuclear Weapons ect ect ect'. If we did not, it might make 'control without harm' an unattainable goal *in the general case*. Sure, it would remain a valuable ideal (as I have stated), but I guess it would break down in cases like the ones you describe . . . which fortunately never occur.