excellent post Brian.
it all goes to honesty. If i know for sure i hit him and the victim doesn't feel it or pretends not to feel it. I'll shoot him again. because in the end I know i really did get him and thats what matters. If the victim doesn't admit it then thats his problem; so i try not to take the anger on yourself because thats what the victim wants...to see you pissed becuase he "evaded" your shot.
thats my philosophy when i dealt with opponents like this, and it does keep my frustration down.