One of the "cures" the military had for "spray and pray" that was done during the Vietnam War was to make the "M-16" select fire with three round burst vs. full auto. I understand "in the heat of the moment" and a three round burst may not provide enough cover fire.
There was a video submitted in one thread that showed a cop, California I think, who thought he saw a weapon and dumped 11 rounds into the citizen, who was getting out of his car, in his own driveway. No weapon was found it seems. Some of the comments by his fellow officers after the shoot were quite revealing.
Anyway. I do not know what I would do in a firefight, not ever being in one, I hope that I would have more trigger discipline. I also hope I do not have to test myself.