Regarding using something of Marc Anthony's verbal take-down of Brutus from /Julius Ceasar/, Octavian's verbal take-down of Marc Anthony was pretty good that way, too. From the first, I can just hear "...and Dumbledore is an honorable wizard..." used as appropriate.
I may or may not. Harry is not a Jedi, therefore he can get away with the subtle sneers, but he wants to train Jedi, and so, he has to be a cautious statesman. Meh. He's got a year to figure it out.