I love squeaking. Bunny squeaks are my favorite.
Since it's so questionable as to any given non-robo player's identity, perhaps we could give OBEYing bunnies a way to 'report' to the robo? With whispers, we already have a proximity-driven way to send messages to the robot. Maybe when a bunny squeaks, the message 'X speaks' is visible to the robot, where X is the player's name?