I just *love* you people
Zombies, serial killers, ninja gangbangers... I *love* it!
If I pull my gun on someone, it's damn straight that I'm not going to be producing "cover fire" or the "spray and pray" method. I'm going to hit what I'm aiming at! The point is not to pull a gun out and make them run away. Never pull a gun unless you're willing to kill the person you pulled it out for!
Cover fire is used in tactical military operations, yes, when people need to move from point A to point B without too big a worry about the people shooting back because they're going to be under cover!
I live in Wyoming, and I've never heard of a farmer being attacked by a roving herd of zombieserial killer, ninja gangbangers. Dennis Radar, for that comment, had no ninja skills, was a serial killer, yes, not a zombie and he typically went after smallish women one-on-one.
Even in the most rural parts of our fine country, the chances of you running into this situation is slim to none. Unless, of course, you're playing a video game in said rural parts.