String. First of all, I wouldn't hesitate to give up my octo if another diver signaled me.
All nice cute theory but when a diver really needs air not part of training the signalling and waiting is the first thing ignored. They need air and they need it *now*, they WILL go for your octopus or they will go for your reg. They need to breathe. To them nothing else matters.
That clicking noise and no air on totally empty lungs is pretty much guaranteed to make most people forget cosmetics like signals and waiting. Once they have air most will calm down. Refusing them air you create a potentially life threatening situation and even manage to make it worse.
Pushing someone away who is trying to get an octo off you to me is refusing to give a potentially dying diver life saving gas and at very least in my eyes an assault.
If someone wants my air or my reg that can have it immediately, no questions asked. THEN we sort out whats happened and how to get out of it. (....although if its a rich nitrox mix i may charge you for it afterwards at that stuff isnt cheap
