In response to the Role of Protesting: I truly do not think socrates is protesting anything. He seems to be basically ok with how Athens is run. Him remaining true to his principles is him trying to die with honor though he no longer feels that he has a role to play in Athens because of the generations of slander that have been brought against him. I do think that Plato definitely played this whole situation up a little bit for dramatic effect.
In response to Force, Rhetoric, and the Apology: I think that rhetoric is one of socrates most important tools because it is the easiest way to get people to question their own positions. My favorite example so far is when he basically gets Euthyphro to prove himself wrong by making Euthyphro state that the gods often disagree.