The 'warning' in my area is more like a "we're done, no one talks to this coach" kind of deal. That's the hard crew warning, I don't consider an individual "settle down coach" or "knock it off coach" to be a crew warning. A crew warning happens when the coach has used up all his rope, be it with the crew as a whole or one individual. When that happens the crew no longer communicates with the coach other than to deliver the warning. The warning official can talk to the coach if need be, but the other two officials are done with him. It's been tricky for me to figure out to say the least.