That’s not always correct to assume they are “criminals”.
In a recent D-Day game I used 3 squads to get through to a Panther and detonate it, spending at least 4-5 minutes on it, after it killed two of my squads.
So it was 5 squads, being bombed once or twice, tank-suppressed twice, machine gunned once, killing two or three Germans, then reaching the tank with the last man.
The tank was a mass-killer, so if the game would differentiate between killing a lazy camper and such war machines, I could have become a battle hero of that round. 
Instead, I was mediocre at best. But not a criminal, even though my K/D ratio wasn’t something I wish to share.