Rules of the Air are there for a reason. If a pilot is willing to forego his right of way then that's his choice to do so as a matter of courtesy. It's not the right of the other pilot to demand that the rules are ignored for his own benefit.
If another pilot asks if I can do something outside the rules, and it's put in a nice manner (as a request), and won't jeopardise the safety of my own flight, then I'll most likely comply. If it's not done in that manner then they can go look up the rules again whilst they're waiting for me to finish my manouevres
