Perhaps there is some police force that does this, but I'd really like to see how a "warning shot" is defined, because it's incredibly reckless and dangerous to

Perhaps there is some police force that does this, but I'd really like to see how a "warning shot" is defined, because it's incredibly reckless and dangerous to fire a shot at anything, let alone a randomly chosen surface with people around. The bullet doesn't just stop... and firing at someone that also has a gun is a surefire way to get them to shoot back.