I believe Steeleyes may have misremembered part of the rescue class. In the class, you are taught that one method of dealing with a panicked diver on the surface is to go beneath, come up from behind, and take control as described. A panicked diver on the surface is not looking for an air source. What you are supposed to do once you are in that position is grab the inflator house and make the panicked diver buoyant. A panicked diver will likely calm down as soon as buoyancy is achieved.
That's the theory anyway. I have never seen a panicked diver on the surface, and I don't know anyone else who has, either. In the only cases I have heard of, a panicked diver under water gets calm pretty quickly after reaching the surface. The concern in this thread is the panicked OOA diver under water.