If the firearm comes out, it is shooting time. There is no reason to draw and bark commands to save a store from getting robbed. I have no requirement by law in my state of residence to do so. Nor do I have a requirement to bark commands. I am not an LEO nor do I have backup coming. Be smart. It is either a threat to my life or it isn't. I can either safely egress or I cannot.
If I draw I am shooting because I am in fear of my life or my families life, I don't legally have to tell anyone to freeze, drop anything, get down, or put the weapon down. I can stand my ground and immediately defend myself by law if the threat is there. Draw and shoot or egress from the line of fire and or store. There is a time for words and a time for action. Act accordingly.