Excellent points, and thank you for pointing them all out.

I think that a solution to the "troll problem" is to call their bluff, and call them what they want to be called (provided it's not obscene or racist or otherwise improper for the school in question). Just as school kids can be excellent trolls to authority, they can be excellent trolls to each other, and I'd bet that other students referring to "Bob Smith" as "Meow-meow FuzzKitty" would get real old real fast. It might even demonstrate to Meow-meow what it feels like to be called something you don't actually identify with. Or serving to normalize calling people what they want to be called.