Steal killers do suck but what I hate is working on a guy for a bit, getting right in the saddle, fixing to pull the trigger and some moron shoots tracers over me and the bad guy starts flopping like a fish or dives to the deck.
If someone is in the saddle, DON"T interfere.
If an enemy is fighting 2 or more of your guys, DON'T interfere.
If an enemy is going down, DON'T waste ammo and E trying to steal a kill.
I always get a kick out of 6 guys chasing 1 P-51 or something. It's just so stupid!