the only difference in leaving kill shooter on, or shutting it off, is who gets punished for pulling the trigger, if your squaddie flies in front of you! As a habit, I stop shooting when my squaddie gets in front of me, so I don't punish him.
its all about discipline. It shouldn't matter if its on or off! So you killshot yourself, shame on you, it would've been your squaddie instead!
the CM's do a great job, but they too are human. you could always volunteer to join the CM team, so that you could do the setups, and make sure that it never happens again.....
just my 2 cents! Axis uber alles!!!