Nonsense, warning shots and revealing your position? That isn’t a situation when warning shots are used.
Precious resources and lethal to bystanders? My Glock 17 and firing into the ground?
Malfunction? Because you only get 1 shot out of your Glock so it has to count?
In a confrontation where you can’t get the man to see reason, pumping two rounds in the ground in front of him and then pointing it at his chest will really get his attention.
Warning shots are great, it may not be suitable for the terrified and weak, but for people capable of asserting some control over situations, some physical presence, it gives another powerful assertive tool to diffuse situations.
If guns are used a couple of million times a year to diffuse situations, then clearly your gun does not need to draw blood every time it is pulled.
Those who have know what can go wrong likely will. Do it how ever you chose. Some say they know it all and have the stones to stand and waste ammo into the “ground” etc. How many live on concrete and pavement? C’mon, friend.
Best;